伊通盆地伊69井区成藏条件研究

发布时间：2018-03-21 07:55

本文选题：伊69井　切入点：源岩评价　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：伊69井位于伊通盆地伊丹凸起区,该井钻探主要目的是探索伊丹凸起构造高部位的含油气性。针对该地区基岩岩性较复杂,在基岩内部碳酸盐岩的首次发现石油地质意义重大,因此研究难点在于灰岩的变质时期、生烃能力以及储集能力的研究。通过收集分析伊69井钻井地质设计、录井、测井、地震数据体、化验分析、前人研究成果(报告、多媒体)、扫描电镜、系统取样等资料,对伊69井进行了基础地质条件分析、烃源岩定向和定量评价、储层评价、盖层评价,系统研究了该区的生、储、盖、运、圈(保)等成藏要素及其时空匹配关系,最终完成了对伊69井区天然气成藏条件的研究。结果表明,碎屑岩双一段发育厚度大、丰度高、类型好、成熟度高的高品质烃源岩,保证了双二段充足的气源条件。井区碎屑岩整体物性为中等-好级别,气层岩性发育以分流河道间粉砂岩物性最好;大面积发育的扇三角洲前缘砂体为油气聚集提供有利的储集空间。双三段的盖层物性差,封闭性好。伊丹凸起具备较好的烃源岩条件和盖层条件,但储层条件较差。烃源岩大量生排烃期开始于圈闭形成前,圈闭对于早期烃源岩的生烃聚集是无效的。本次研究通过认识生、储、盖特征及其时空匹配关系,总结伊69井区天然气成藏条件及其控制因素,对下步勘探部署提供指导。
[Abstract]:Well Y69 is located in the Yidan uplift area of Yitong Basin. The main purpose of drilling this well is to explore the oil-gas-bearing characteristics of the high position of the Yidan uplift structure. In view of the complexity of the bedrock lithology in this area, the first discovery of carbonate rock inside the bedrock is of great significance in petroleum geology. Therefore, the research difficulty lies in the metamorphic period of limestone, hydrocarbon generation ability and reservoir capacity. Through collecting and analyzing well Y69 well drilling geological design, logging, logging, seismic data body, laboratory analysis, previous research results, The basic geological conditions, hydrocarbon source rock orientation and quantitative evaluation, reservoir evaluation, caprock evaluation, generation, reservoir, cap and transport of Y69 well were systematically studied by means of multimedia, scanning electron microscope and systematic sampling. The gas accumulation conditions in Y69 well area were finally studied. The results showed that the high quality hydrocarbon source rocks with large thickness, high abundance, good type and high maturity were developed in the double member of clastic rock. The overall physical property of clastic rocks in the well area is medium to good, and the lithologic development of gas reservoir is best in the siltstone between distributary channels. The large area of fan delta front sand bodies provide favorable reservoir space for oil and gas accumulation. The double third member has poor physical properties of caprock and good sealing. The Yidan uplift has better hydrocarbon source rock and caprock conditions. However, the reservoir conditions are poor. The hydrocarbon generation and expulsion stage of source rocks began before the trap formation, and the trap is ineffective for hydrocarbon generation and accumulation of early source rocks. The conditions and controlling factors of natural gas accumulation in Y69 well area are summarized, which provide guidance for the next exploration deployment.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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