下扬子黄桥地区上古生界二叠系油气运聚系统研究

【作者】 张凯；

【导师】 周立发；

【作者基本信息】 西北大学 ， 石油与天然气工程， 2012， 硕士

【摘要】 下扬子黄桥地区的地理位置位于泰州市泰兴黄桥镇的西南部,构造上位于苏北坳陷区与苏南隆起区的过渡带黄桥斜坡。近年来黄桥地区上古生界发现了大量的含油层系,如在栖霞组发现了黄桥二氧化碳气层并投入到开发中取得了重大的经济效益,近期为了突破油气勘探储量大大加强了勘探的力度,尤其是加大了对上古生界二叠系龙潭组和栖霞组油气的勘探力度,因油气运聚系统的研究对减小勘探的风险、降低勘探资金投入和加快勘探的进程有重大意义,所以对上古生界二叠系油气运聚系统的研究十分必要并且具有十分重要的意义。黄桥地区上古生界二叠系储层的岩石基质的储、渗能力极差,属于低孔、低渗型储集岩-非储集岩。本论文主要依据对单井资料的描述建立油气运聚系统模型,在单井描述的基础上,利用地震反演；相干分析；速度分析等技术进行油气疏导、储集系统描述,本文主要分别从二叠系盖层的分布特征、孔洞缝的发育特征以及断裂对油气运聚的影响这三个方面来研究。经研究得到上古生界二叠系的栖霞组主要为碳酸盐岩地层,二叠系的大隆组-龙潭组-孤峰组主要为碎屑岩地层。在工区范围内的盖层发育主要为大隆组-龙潭组地层异常压力封盖类型,裂隙主要分布在二叠系碎屑岩裂缝发育带、孔洞主要分布在二叠系栖霞组碳酸盐岩中。构造运动及其断裂对于构造微裂缝的形成与分布具有重要意义,栖霞组获高产二氧化碳气流储存的裂缝、溶洞均与断裂有较为密切的关系,断裂对改善二叠系地层的储积性能以及对油气的再次运移都有十分重要的意义。综合上述研究得出了上古生界二叠系地层孔、洞发育带有下扬子黄桥地区一号孔、洞发育带,下扬子黄桥地区二号孔、洞发育带,下扬子黄桥地区三号孔、洞发育带；裂缝带有下扬子黄桥地区一号裂缝发育带,下扬子黄桥地区二号裂缝发育带及下扬子黄桥地区三号裂缝发育带；封盖区有大隆组-龙潭组地层异常压力封盖区；断裂系统有NE-NNE向断裂系统和NWW向断裂系统。更多还原

【Abstract】 Huangqiao si located in the southwest of Huangqiao town of the Taixing city,belongs to the transition zone between Subei depression and Sunan uplift, Huangqiao slope.In recent years, a large number of oil-bearing strata were founded in Upper Paleozoic of Huangqiao region, for example,carbon dioxide gas reservoir was founded in the the Qixia group, and put into development achieved significant economic benefits.Recently, for breakthrough in the oil and gas exploration reserves,the intensity of exploration is greatly enhanced.Especially in the Permian Longtan Formation of the Upper Paleozoic, Qixia group, as the research of hydrocarbon migration and accumulation system have great significance in reduce the risk of exploration, lower the capital investment for exploration and speed up the process of exploration, so research of Upper Paleozoic Permian hydrocarbon migration and accumulation system is necessary and of great significance。Rocks of Upper Paleozoic, Permian reservoir in Huangqiao areas has a poor capacity of storage and infiltration, it belongs to low porosity and low permeability reservoir rock-non-reservoir rock。This thesis is mainly based on the description of the single well data, to make up oil and gas migration and accumulation model, Use the skills just as the strata wave impedance inversion, Coherence analysis, Velocity analysis and so on to conduct oil and gas ease and description of the reservoir system.That is three aspects were discussed in this paper,that is the distribution characteristics of Permian cap. The growth characteristics of holes sewn and the impact of break in oil and gas migration.During the study, we can find that Qixia group of Upper Paleozoic Permian is mainly of carbonate strata, Dalong group-Longtan group-Gufeng group in Permian are mainly of clastic rocks。 The cap rock development in the work area is mainly of abnormal pressure of cover type in Dalong group-Longtan group, the cracks are mainly distributed in the Permian clastic rocks fracture development band、the holes are mainly located in the Permian Xixia Carbonate. Tectonic movement and its fracture have great significance in constructing micro-crack formation and distribution, cracks in Huanglong group and cracks and caves caused high-yield carbon dioxide gas flow in Qixia group all have a close relationship with the fracture, Fracture has great significance in improve the stratigraphic accumulation performance as well as oil and gas re-migration.The above studies the Permian strata of the Upper Paleozoic crack with kongjiaqiao well-Su174well fracture zone, N4well-Changshengl well fracture zone and Haian-Rugao of fracture zone; cover the area of the Dalong-Longtan Formation abnormal pressure of cover area;there were fault system in the NE-NNE fault system and the NWW trending fault system.更多还原