辽东湾坳陷油气成藏动态耦合过程研究
发布时间：2019-03-28 18:22
【摘要】：辽东湾坳陷是渤海湾盆地重要产油区,勘探开发程度已较高,需要寻找潜在的勘探新区域,因此加强油气成藏研究是必要的,成藏过程是一个复杂的动态过程,涉及多个成藏要素的时空配置关系,目前对辽东湾坳陷成藏要素的空间配置关系已有较深入的认识,但对动态耦合过程的研究还不够系统。本文通过对典型油气藏成藏特征研究,认识到辽东湾坳陷油气成藏主控因素是烃源、断裂、圈闭、温压系统等,在此基础上利用生烃动力学、盆地模拟、油气地球化学、沉积构造分析等方法,研究辽东湾坳陷烃源岩热演化过程、生排烃过程、圈闭演化过程、断裂系统演化过程、油气充注等过程的耦合关系,恢复辽东湾坳陷的成藏动态过程,论文取得的成果如下。(1)辽东湾坳陷油气成藏的主控因素表现在,烃源岩演化决定了烃类流体性质的差异;优质烃源岩分布控制了油气富集区的展布;断裂系统控制了储层分布与质量、油气的运移与保存;异常高压既为烃源岩提供排烃动力又为下伏油气提供遮挡;有效圈闭形成时间定了油气聚集的成败。(2)利用Easy%Ro动力学模型进行的单井、二维、三维模拟结果表明,在东营组三段沉积末(距今30.3Ma)沙河街组三、四段烃源岩进入生烃门限,沙河街组一段、东营组三段烃源岩均未进入生烃门限。东营组一段沉积末期(距今23.3Ma)沙河街组三、四段烃源岩达到生油气高峰阶段,沙河街组一段和东营组三段下烃源岩进入生烃门限。现今,主力烃源岩均处于大量生烃阶段。北段比中段南段成熟度高,南段烃源岩进入生烃门限时间最晚。(3)借鉴构造演化阶段,结合辽东湾各期构造应力场及断裂剖面演化图,根据大量地震解释剖面上断层断点断距和上下盘厚度差恢复了辽东湾坳陷断裂系统在各沉积时期的活动性,距今65-38Ma主干断裂多为初始发育期,活动速率小于30m/Ma。距今38-32.8Ma,活动速率开始增大,活动速率集中在30-60m/Ma。距今约32.8-24.6Ma北段辽西3号、辽中1号、辽东2号均有一定的活动性,活动速率集中在30-90m/Ma之间。距今24.6-12.0Ma各断层多处于静止状态。仅北段辽中2号北段有一定活动性,活动速率为6.23m/Ma。(4)辽中坳陷北段深层超压幅度最大,压力系数可达1.60~1.80。辽中凹陷及辽西凸起异常高压主要分布在东营组二段下至沙河街组一段和沙河街组三段。通对JZ25-1沙河街组油气包裹体捕获压力系数的计算值集中在1.20~1.40之间,推断在辽东湾坳陷北段油气大规模充注时期,地层已普遍发育超压。(5)恢复了辽东湾坳陷北段辽西凸起区、辽中凹陷区、辽东凸起区,中段辽西凸起区和辽中凹陷区以及南段的辽中凹陷区成藏耦合动态过程,通过对比已发现的大型油气田成藏耦合过程,预测辽东凸起北段JZ23构造带为有利勘探区域,JZ23构造具有良好的成藏条件且成藏主控因素之间具有较好的动态耦合关系,勘探潜力较大。
[Abstract]:Liaodong Bay depression is an important oil-producing area in Bohai Bay Basin, and the exploration and development degree is high. Therefore, it is necessary to strengthen the study of oil and gas accumulation, and the reservoir-forming process is a complex dynamic process. There is a deep understanding of the spatial distribution of reservoir-forming elements in Liaodong Bay depression at present, but the research on dynamic coupling process is not systematic enough. Based on the study of typical reservoir-forming characteristics, the main controlling factors of hydrocarbon accumulation in Liaodong Bay depression are hydrocarbon source, fault, trap, temperature-pressure system and so on. On this basis, hydrocarbon generation dynamics, basin simulation, oil and gas geochemistry, etc., are used to make use of hydrocarbon generation dynamics, basin simulation and oil and gas geochemistry. The thermal evolution process, hydrocarbon generation and expulsion process, trap evolution process, fault system evolution process and hydrocarbon filling process of the Liaodong Bay depression are studied by means of sedimentary structure analysis and other methods, and the reservoir formation dynamic process of the Liaodong Bay depression is restored. The results obtained in this paper are as follows. (1) the main controlling factors of hydrocarbon accumulation in Liaodong Bay depression are that the evolution of source rocks determines the difference of hydrocarbon fluid properties; The distribution of high quality source rocks controls the distribution of oil and gas enrichment areas, fault systems control reservoir distribution and quality, migration and preservation of oil and gas, abnormally high pressure not only provides hydrocarbon expulsion power for source rocks, but also provides shelter for underlying oil and gas. The formation time of effective traps determines the success or failure of oil and gas accumulation. (2) the results of single well, two-dimensional and three-dimensional simulation by using Easy%Ro dynamic model show that at the end of the third member of the Dongying formation (up to now 30.3Ma) Shahejie formation three, The source rocks of the fourth member enter the threshold of hydrocarbon generation, the first member of Shahejie formation and the third member of Dongying formation do not enter the threshold of hydrocarbon generation. The source rocks of the third and fourth member of the Shahejie formation in the first member of the Dongying formation (23.3Ma) reach the peak stage of oil and gas generation, and the lower source rocks of the first member of the Shahejie formation and the third member of the Dongying formation enter the hydrocarbon generation threshold. Nowadays, the main source rocks are in a large amount of hydrocarbon generation stage. The maturity of the northern part is higher than that of the middle section, and the hydrocarbon source rock in the south reaches the threshold time of hydrocarbon generation. (3) referring to the stage of tectonic evolution, combined with the evolution map of tectonic stress field and fault profile in each stage of Liaodong Bay, Based on a large number of seismic interpretation profiles, the activity of fault system in Liaodong Bay depression during each sedimentary period has been restored by the fault distance and the difference in the thickness of the upper and lower plates. The main faults of 65-38Ma are mostly in the initial stage of development and the rate of activity is less than 30mgma. From 38 to 32.8 Ma, the activity rate began to increase, and the activity rate was concentrated at 30 ~ 60 m 路Ma ~ (- 1). Up to now, there is a certain activity in west Liaoning 3, Liaozhong 1 and Liaodong 2 in the northern part of 32.8-24.6Ma, and the rate of activity is concentrated between 30-90m/Ma. Up to now, most of the faults in 24.6-12.0Ma are in static state. Only the northern part of Liaozhong No.2 is active, and the rate of activity is 6.23m / Ma. (4) the maximum amplitude of deep overpressure is found in the northern part of Liaozhong depression, and the pressure coefficient can reach 1.60x1.80. The abnormal high pressure in Liaozhong sag and western Liaoning uplift is mainly distributed in the first member from the second member of Dongying formation to the first member of Shahejie formation and the third member of Shahejie formation. The calculated values of oil-gas inclusion capture pressure coefficient of JZ25-1 Shahejie formation are between 1.20 and 1.40, and the large-scale filling period of oil and gas in the northern part of Liaodong Bay depression is inferred. Overpressure has generally developed in the strata. (5) the dynamic process of reservoir-forming coupling has been restored in the northern part of Liaodong Bay depression, the western Liaoning uplift area, the central Liaoning depression area, the eastern Liaoning uplift area, the central Liaoning uplift area and the central Liaoning depression area, and in the southern part of the Liaodong Bay depression, the reservoir-forming and coupling processes have been restored in the northern part of the Liaodong Bay depression. By comparing the reservoir-forming coupling process discovered in the large-scale oil and gas fields, it is predicted that the JZ23 structural belt in the northern segment of the Liaodong uplift is a favorable exploration area, and that the JZ23 structure has good reservoir-forming conditions and a good dynamic coupling relationship between the main controlling factors of the reservoir-forming. There is a great potential for exploration.
【学位授予单位】：成都理工大学
【学位级别】：博士
【学位授予年份】：2016
【分类号】：P618.13
本文编号：2449116
[Abstract]:Liaodong Bay depression is an important oil-producing area in Bohai Bay Basin, and the exploration and development degree is high. Therefore, it is necessary to strengthen the study of oil and gas accumulation, and the reservoir-forming process is a complex dynamic process. There is a deep understanding of the spatial distribution of reservoir-forming elements in Liaodong Bay depression at present, but the research on dynamic coupling process is not systematic enough. Based on the study of typical reservoir-forming characteristics, the main controlling factors of hydrocarbon accumulation in Liaodong Bay depression are hydrocarbon source, fault, trap, temperature-pressure system and so on. On this basis, hydrocarbon generation dynamics, basin simulation, oil and gas geochemistry, etc., are used to make use of hydrocarbon generation dynamics, basin simulation and oil and gas geochemistry. The thermal evolution process, hydrocarbon generation and expulsion process, trap evolution process, fault system evolution process and hydrocarbon filling process of the Liaodong Bay depression are studied by means of sedimentary structure analysis and other methods, and the reservoir formation dynamic process of the Liaodong Bay depression is restored. The results obtained in this paper are as follows. (1) the main controlling factors of hydrocarbon accumulation in Liaodong Bay depression are that the evolution of source rocks determines the difference of hydrocarbon fluid properties; The distribution of high quality source rocks controls the distribution of oil and gas enrichment areas, fault systems control reservoir distribution and quality, migration and preservation of oil and gas, abnormally high pressure not only provides hydrocarbon expulsion power for source rocks, but also provides shelter for underlying oil and gas. The formation time of effective traps determines the success or failure of oil and gas accumulation. (2) the results of single well, two-dimensional and three-dimensional simulation by using Easy%Ro dynamic model show that at the end of the third member of the Dongying formation (up to now 30.3Ma) Shahejie formation three, The source rocks of the fourth member enter the threshold of hydrocarbon generation, the first member of Shahejie formation and the third member of Dongying formation do not enter the threshold of hydrocarbon generation. The source rocks of the third and fourth member of the Shahejie formation in the first member of the Dongying formation (23.3Ma) reach the peak stage of oil and gas generation, and the lower source rocks of the first member of the Shahejie formation and the third member of the Dongying formation enter the hydrocarbon generation threshold. Nowadays, the main source rocks are in a large amount of hydrocarbon generation stage. The maturity of the northern part is higher than that of the middle section, and the hydrocarbon source rock in the south reaches the threshold time of hydrocarbon generation. (3) referring to the stage of tectonic evolution, combined with the evolution map of tectonic stress field and fault profile in each stage of Liaodong Bay, Based on a large number of seismic interpretation profiles, the activity of fault system in Liaodong Bay depression during each sedimentary period has been restored by the fault distance and the difference in the thickness of the upper and lower plates. The main faults of 65-38Ma are mostly in the initial stage of development and the rate of activity is less than 30mgma. From 38 to 32.8 Ma, the activity rate began to increase, and the activity rate was concentrated at 30 ~ 60 m 路Ma ~ (- 1). Up to now, there is a certain activity in west Liaoning 3, Liaozhong 1 and Liaodong 2 in the northern part of 32.8-24.6Ma, and the rate of activity is concentrated between 30-90m/Ma. Up to now, most of the faults in 24.6-12.0Ma are in static state. Only the northern part of Liaozhong No.2 is active, and the rate of activity is 6.23m / Ma. (4) the maximum amplitude of deep overpressure is found in the northern part of Liaozhong depression, and the pressure coefficient can reach 1.60x1.80. The abnormal high pressure in Liaozhong sag and western Liaoning uplift is mainly distributed in the first member from the second member of Dongying formation to the first member of Shahejie formation and the third member of Shahejie formation. The calculated values of oil-gas inclusion capture pressure coefficient of JZ25-1 Shahejie formation are between 1.20 and 1.40, and the large-scale filling period of oil and gas in the northern part of Liaodong Bay depression is inferred. Overpressure has generally developed in the strata. (5) the dynamic process of reservoir-forming coupling has been restored in the northern part of Liaodong Bay depression, the western Liaoning uplift area, the central Liaoning depression area, the eastern Liaoning uplift area, the central Liaoning uplift area and the central Liaoning depression area, and in the southern part of the Liaodong Bay depression, the reservoir-forming and coupling processes have been restored in the northern part of the Liaodong Bay depression. By comparing the reservoir-forming coupling process discovered in the large-scale oil and gas fields, it is predicted that the JZ23 structural belt in the northern segment of the Liaodong uplift is a favorable exploration area, and that the JZ23 structure has good reservoir-forming conditions and a good dynamic coupling relationship between the main controlling factors of the reservoir-forming. There is a great potential for exploration.
【学位授予单位】：成都理工大学
【学位级别】：博士
【学位授予年份】：2016
【分类号】：P618.13
【参考文献】
相关期刊论文 前5条
1 孙晓猛;王书琴;王英德;杜继宇;许强伟;;郯庐断裂带北段构造特征及构造演化序列[J];岩石学报;2010年01期
2 陈宣华;尹安;George E.Gehrels;蒋荣宝;陈正乐;白彦飞;;阿尔金山东段地质热年代学与构造演化[J];地学前缘;2009年03期
3 张岳桥;董树文;;郯庐断裂带中生代构造演化史: 进展与新认识[J];地质通报;2008年09期
4 滕玉波;周心怀;加东辉;魏泽典;;辽东湾锦州31-A区块岩性圈闭成藏条件分析[J];中国石油勘探;2007年05期
5 汤加富,李怀坤,娄清;郯庐断裂南段研究进展与断裂性质讨论[J];地质通报;2003年06期
相关硕士学位论文 前1条
1 陈人杰;基于高分辨率多道地震资料的渤中坳陷东部新构造运动研究[D];中国海洋大学;2014年
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