苏53区块南水平井开发井网优化研究
发布时间：2018-10-23 18:25
【摘要】：苏53区块南部构造位于鄂尔多斯盆地伊陕斜坡北部中带,主体构造为西北倾的单斜构造,目的层盒8段及山1段分别为辫状河沉积和曲流河沉积,储集体为心滩、边滩和河道砂,是控制苏53区块南部地区有利区的主要微相。平面上砂体成北西-南东条带状分布,局部连片;垂向上有效砂体叠瓦状分布,侧向连续性差,造成气藏分布的复杂性及储层非均质性强。通过储层建模相关认识,结合地应力和天然微裂缝发育情况预测了有效储集砂体分布规律,在此基础上利用地震属性预测有利含气区。研究区砂体总体呈现连片分布,其中,中、西部(苏53-3、苏53-4)地区砂体累积厚度较大,最大超过30米,东部(苏53-8)地区累积厚度不足3米,含气有利区和砂体厚度分布有较好的一致性。根据苏里格地区“一点法”产能经验公式,计算得出38口水平井平均产能44×104m3/d;利用物质平衡法、生产动态分析法、双对数拟合法等9种方法对水平井进行了试采动态特征分析,预测了目前38口水平井平均单井井控动态储量7039×104m3,通过建立各井井控动态储量的预测图版,得出研究区平均单井最终井控动态储量12391×104m3。苏53区块南部地区通过数值模拟,认为合理水平段长度应控制在800~1000m之间,水平井的方位与地层主应力垂直,即为350°左右,通过压恢试井解释、经济极限井网密度、合理采气速度、储量丰度、等效渗流计算及数值模拟结果,综合认为合理井距为600~800m。根据储层砂体分布特点采用近似菱形的不规则井网,井排间井点交叉分布。通过对井网方式、井网与地应力的关系、井距、水平井设计参数、产能、井控动态储量这几方面全面的综合分析,认为目前水平井井网与气藏地质具有较好的适应性,达到了水平井开发的技术经济要求。
[Abstract]:The southern part of Su53 block is located in the northern middle belt of the Yishan slope in Ordos Basin. The main structure is a northwestern monoclinic structure, the target layer 8 member and the Shan 1 member are braided river deposits and meandering river deposits respectively, and the reservoir body is the core beach. The beach and channel sand are the main microfacies controlling the favorable area in the southern part of Su53 block. The sand bodies on the plane are distributed in the north west south east strip and the vertical effective sand bodies are imbricate distribution with poor lateral continuity which leads to the complexity of the gas reservoir distribution and the strong heterogeneity of the reservoir. Based on the understanding of reservoir modeling and combining with the development of in-situ stress and natural micro-fractures, the distribution law of effective reservoir sand bodies is predicted. On this basis, favorable gas-bearing areas are predicted by seismic attributes. The sand bodies in the study area generally show a continuous distribution. In the west (Su 53-3, Su 53-4), the accumulated thickness of the sand body is larger, the maximum is more than 30 meters, and the accumulated thickness in the east (Su 53-8) is less than 3 meters. There is good consistency between the thickness distribution of gas bearing favorable zone and sand body. According to the empirical formula of "one point method" productivity in Sulige area, the average productivity of 38 horizontal wells was calculated and obtained, and 9 methods, such as material balance method, production dynamic analysis method and double logarithm fitting method, were used to analyze the performance characteristics of horizontal wells. The average single well controlled reserves of 38 horizontal wells at present are predicted at 7039 脳 10 ~ 4m ~ (3). By establishing the prediction chart of each well's control performance reserves, it is obtained that the average final well control performance reserves in the study area are 12391 脳 10 ~ (4) m ~ (3). Through numerical simulation in the southern area of Su53 block, it is considered that the reasonable horizontal section length should be controlled between 800m and 1000m, and the orientation of horizontal well should be vertical to the main stress of formation, that is, 350 掳. The economic limit well pattern density can be explained by pressure recovery well test. The reasonable gas production rate, reserve abundance, equivalent seepage calculation and numerical simulation results show that the reasonable well spacing is 600 ~ 800m. According to the distribution characteristics of reservoir sand body, the irregular well pattern is approximately rhombic, and the cross distribution of well points between rows is adopted. Through comprehensive analysis of well pattern mode, the relationship between well pattern and ground stress, well spacing, horizontal well design parameters, productivity, well control dynamic reserves, it is concluded that the horizontal well pattern has good adaptability to gas reservoir geology. Meet the technical and economic requirements of horizontal well development.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE243
，
本文编号：2290099
[Abstract]:The southern part of Su53 block is located in the northern middle belt of the Yishan slope in Ordos Basin. The main structure is a northwestern monoclinic structure, the target layer 8 member and the Shan 1 member are braided river deposits and meandering river deposits respectively, and the reservoir body is the core beach. The beach and channel sand are the main microfacies controlling the favorable area in the southern part of Su53 block. The sand bodies on the plane are distributed in the north west south east strip and the vertical effective sand bodies are imbricate distribution with poor lateral continuity which leads to the complexity of the gas reservoir distribution and the strong heterogeneity of the reservoir. Based on the understanding of reservoir modeling and combining with the development of in-situ stress and natural micro-fractures, the distribution law of effective reservoir sand bodies is predicted. On this basis, favorable gas-bearing areas are predicted by seismic attributes. The sand bodies in the study area generally show a continuous distribution. In the west (Su 53-3, Su 53-4), the accumulated thickness of the sand body is larger, the maximum is more than 30 meters, and the accumulated thickness in the east (Su 53-8) is less than 3 meters. There is good consistency between the thickness distribution of gas bearing favorable zone and sand body. According to the empirical formula of "one point method" productivity in Sulige area, the average productivity of 38 horizontal wells was calculated and obtained, and 9 methods, such as material balance method, production dynamic analysis method and double logarithm fitting method, were used to analyze the performance characteristics of horizontal wells. The average single well controlled reserves of 38 horizontal wells at present are predicted at 7039 脳 10 ~ 4m ~ (3). By establishing the prediction chart of each well's control performance reserves, it is obtained that the average final well control performance reserves in the study area are 12391 脳 10 ~ (4) m ~ (3). Through numerical simulation in the southern area of Su53 block, it is considered that the reasonable horizontal section length should be controlled between 800m and 1000m, and the orientation of horizontal well should be vertical to the main stress of formation, that is, 350 掳. The economic limit well pattern density can be explained by pressure recovery well test. The reasonable gas production rate, reserve abundance, equivalent seepage calculation and numerical simulation results show that the reasonable well spacing is 600 ~ 800m. According to the distribution characteristics of reservoir sand body, the irregular well pattern is approximately rhombic, and the cross distribution of well points between rows is adopted. Through comprehensive analysis of well pattern mode, the relationship between well pattern and ground stress, well spacing, horizontal well design parameters, productivity, well control dynamic reserves, it is concluded that the horizontal well pattern has good adaptability to gas reservoir geology. Meet the technical and economic requirements of horizontal well development.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE243
，
本文编号：2290099
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