徐家围子断陷营城组火山岩裂缝与天然气成藏

发布时间：2018-01-05 13:14

本文关键词：徐家围子断陷营城组火山岩裂缝与天然气成藏　出处：《大地构造与成矿学》2017年02期 　论文类型：期刊论文

【摘要】：徐家围子断陷营城组火山岩储层虽然发育大量气孔和原生裂缝,但是其连通性差,构造裂缝的发育程度决定了储层的优劣和成藏概率。为了阐明裂缝与天然气成藏之间的关系,首先,利用岩心、成像测井以及实验分析等资料对徐家围子断陷营城组火山岩储层裂缝的成因类型与特征、控制因素、分布规律及形成期次进行了研究,然后结合研究区烃源岩演化、气源断裂活动期次以及盖层封闭能力演化,讨论了构造裂缝与天然气成藏的关系。研究结果显示,徐家围子断陷营城组火山岩发育原生裂缝和次生裂缝,以次生构造裂缝为主。在平面上构造裂缝受断裂、岩性和岩相控制,在纵向上受不整合面控制,具有旋回性分布的特点。构造裂缝主要分三期形成,其中第二期形成时期(泉头组沉积末期-青山口组沉积时期)与烃源岩生烃高峰期相吻合,并且气源断裂处于活动期,盖层也具有很好的封气能力,为研究区主要成藏期。
[Abstract]:In the volcano rock reservoir of Yingcheng Formation, although the development of many pores and primary fractures of Xujiaweizi fault, but its poor connectivity, the development degree of tectonic fracture determines the reservoir quality and accumulation probability. In order to become the relationship between reservoir cracks and natural gas that first of all, based on the core, logging and experimental analysis the data of Xujiaweizi depression volcano rock reservoir origin types and characteristics of layer crack of Yingcheng formation controlling factors, distribution and formation time were studied, and then combined with the source rock evolution, gas source fault activity period and caprock sealing ability evolution, discusses the structural fractures and natural gas accumulation relationship. The results showed that the primary fracture and secondary fracture developed in Yingcheng volcano rocks of Xujiaweizi fault, tectonic fractures are mainly secondary. In plane structural fracture by fracture, lithology and facies control in the longitudinal direction by the Surface control, with cycle distribution characteristics. The tectonic fractures in three phases formed, which formed in the second period (period of Quantou Formation late Qingshankou Formation sedimentary period) is consistent with the peak of hydrocarbon source rocks, and gas source faults in the active stage, the cover layer also has good sealing ability. Study area is the main accumulation period.

【作者单位】：东北石油大学黑龙江省普通高校科技创新团队"断层变形封闭性及与流体运移";中国石油大港油田公司勘探开发研究院;大庆油田公司勘探开发研究院;大庆油田有限责任公司第四采油厂;
【基金】：国家自然科学基金青年基金(41502124);国家自然科学基金重点联合基金(U1562214) 中国博士后科学基金(2015M581424)联合资助
【分类号】：P618.13
【正文快照】： 项目资助:国家自然科学基金青年基金(41502124)、国家自然科学基金重点联合基金(U1562214)和中国博士后科学基金(2015M581424)联合资助。松辽盆地北部徐家围子断陷下白垩统营城组主要为火山岩地层,目前已经在50多口探井中获得了高产工业气流,显示了良好的勘探前景(蔡冬梅等,20

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