吉木萨尔凹陷梧桐沟组成藏主控因素研究
发布时间：2018-08-02 08:51
【摘要】：准噶尔盆地是一个经历多次构造运动的叠合盆地,其复杂的动力学环境决定了准噶尔盆地具有特殊的构造背景,成藏控制因素和成藏机理。准噶尔盆地目前油气资源发现率:石油为30%,天然气为8%;探明率:石油为20.74%,天然气为3.5%。由以上数据可知整个盆地的石油和天然气的开发处于较低水准,充分表明准噶尔盆地还具有很大的勘探前景。经过全盆地第三次资源评价,该盆地油气资源增加的层系主要以二叠系为主,其次是侏罗系,递减的是三叠系。另外,吉木萨尔凹陷作为准噶尔盆地东部一个产油区块,因其多期构造运动形成的西断东超的箕状凹陷,具备形成油气藏的一切地质要素(烃源岩、储集层、盖层、上覆岩层)和作用(圈闭的形成、油气的生成、运移、聚集),使得吉木萨尔凹陷二叠系的勘探受到更多的青睐。本论文主要取得以下五点成果:(1)以地震反射结构特征、界面不整合接触关系、岩心和岩屑录井、测井曲线的形态和突变变化特征作为划分依据,将梧桐沟组重新划分为梧桐沟组一段和梧桐沟组二段,并在此基础上首次将全区梧桐沟组一段自上至下划分为五个砂层组:P3wt11、P3wt12、P3wt13、P3wt14、P3wt15。(2)前人对研究区发育的沉积相类型一直存在争议,针对争议,本论文以扇三角洲与辫状河三角洲的理论概念为依据,以三角洲识别特征:沉积环境及其水动力特征、沉积结构、沉积构造、地震反射特征、砂体形态5个单因素作为论据,充分论证研究区广泛发育辫状河三角洲。(3)通过对研究区构造特征、流体输导体系和动力学环境的多样性的研究,认为研究区发育以构造-岩性油藏为主要类型的复合油气藏,其次为岩性油气藏。(4)通过对研究区构造背景、沉积体系和源储在时空上的配置关系等的研究,总结控制梧桐沟组成藏的因素,并将吉7井区、吉19井区、吉17井区为确定为主要的油藏;吉南井区,吉15井区为次要的油藏。(5)通过对梧桐沟组砂体预测和识别,确定有利区。
[Abstract]:Junggar Basin is a superimposed basin with multiple tectonic movements. Its complex dynamic environment determines that Junggar Basin has a special tectonic setting, reservoir forming controlling factors and reservoir forming mechanism. The discovery rate of oil and gas resources in Junggar basin is 30 for oil and 8 for natural gas, and 20.74 for oil and 3.5for natural gas. According to the above data, the oil and gas development of the whole basin is at a low level, which fully indicates that the Junggar basin has a great prospect of exploration. Through the third resource evaluation of the whole basin, the increase of oil and gas resources in this basin is mainly composed of Permian system, Jurassic system and Triassic system. In addition, as an oil producing block in the east of Junggar Basin, Jimusar Sag has all the geological elements (source rock, reservoir, caprock) formed by its multi-stage tectonic movement. Overlying strata) and action (trap formation, generation, migration and accumulation of oil and gas) make the Permian exploration in Jimusar sag more attractive. The main achievements of this paper are as follows: (1) based on the characteristics of seismic reflection structure, interface unconformity contact relationship, core and cuttings logging, the shape of logging curves and the characteristics of abrupt changes. The Wutonggou formation was redivided into the first section of the Wutonggou formation and the second member of the Wutunghou formation. On this basis, the first section of the Wutonggou formation in the whole area was first divided into five sand formations: 1. P3wt11P3wt12 (P3wt13) P3wt13 (P3wt14P3wt14P3wt1515). (2) the sedimentary facies types developed in the study area have been disputed for the first time. In this paper, based on the theoretical concepts of fan delta and braided river delta, the characteristics of delta identification are as follows: sedimentary environment and its hydrodynamic characteristics, sedimentary structure, seismic reflection characteristics. Five single factors of sand body morphology are used as arguments to fully demonstrate the extensive development of braided river deltas in the study area. (3) the diversity of structural characteristics, fluid transport systems and dynamic environments in the study area is studied. It is considered that the main types of composite reservoirs in the study area are tectonic-lithologic reservoirs, followed by lithologic reservoirs. (4) through the study of the structural background, the relationship between sedimentary system and source reservoir in time and space, etc. The factors controlling the reservoir composition of Wutonggou are summarized, and the main reservoir is identified as well area 7, well 19 and well 17, while the well area Ji 15 in Jinnan area is a secondary reservoir. (5) the favorable area is determined by prediction and identification of sand bodies in Wutonggou formation.
【学位授予单位】：新疆大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13
本文编号：2158891
[Abstract]:Junggar Basin is a superimposed basin with multiple tectonic movements. Its complex dynamic environment determines that Junggar Basin has a special tectonic setting, reservoir forming controlling factors and reservoir forming mechanism. The discovery rate of oil and gas resources in Junggar basin is 30 for oil and 8 for natural gas, and 20.74 for oil and 3.5for natural gas. According to the above data, the oil and gas development of the whole basin is at a low level, which fully indicates that the Junggar basin has a great prospect of exploration. Through the third resource evaluation of the whole basin, the increase of oil and gas resources in this basin is mainly composed of Permian system, Jurassic system and Triassic system. In addition, as an oil producing block in the east of Junggar Basin, Jimusar Sag has all the geological elements (source rock, reservoir, caprock) formed by its multi-stage tectonic movement. Overlying strata) and action (trap formation, generation, migration and accumulation of oil and gas) make the Permian exploration in Jimusar sag more attractive. The main achievements of this paper are as follows: (1) based on the characteristics of seismic reflection structure, interface unconformity contact relationship, core and cuttings logging, the shape of logging curves and the characteristics of abrupt changes. The Wutonggou formation was redivided into the first section of the Wutonggou formation and the second member of the Wutunghou formation. On this basis, the first section of the Wutonggou formation in the whole area was first divided into five sand formations: 1. P3wt11P3wt12 (P3wt13) P3wt13 (P3wt14P3wt14P3wt1515). (2) the sedimentary facies types developed in the study area have been disputed for the first time. In this paper, based on the theoretical concepts of fan delta and braided river delta, the characteristics of delta identification are as follows: sedimentary environment and its hydrodynamic characteristics, sedimentary structure, seismic reflection characteristics. Five single factors of sand body morphology are used as arguments to fully demonstrate the extensive development of braided river deltas in the study area. (3) the diversity of structural characteristics, fluid transport systems and dynamic environments in the study area is studied. It is considered that the main types of composite reservoirs in the study area are tectonic-lithologic reservoirs, followed by lithologic reservoirs. (4) through the study of the structural background, the relationship between sedimentary system and source reservoir in time and space, etc. The factors controlling the reservoir composition of Wutonggou are summarized, and the main reservoir is identified as well area 7, well 19 and well 17, while the well area Ji 15 in Jinnan area is a secondary reservoir. (5) the favorable area is determined by prediction and identification of sand bodies in Wutonggou formation.
【学位授予单位】：新疆大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13
【参考文献】
相关期刊论文 前1条
1 方世虎;宋岩;徐怀民;范瑞东;刘楼军;许秀才;;构造演化与含油气系统的形成——以准噶尔盆地东部吉木萨尔凹陷为例[J];石油实验地质;2007年02期
，本文编号：2158891
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