周军良,胡勇,何康,陈红兵,何逸凡

• 1:中海石油(中国)有限公司天津分公司渤海石油研究院

摘要(Abstract)：

以测压、薄片、扫描电镜、常规物性分析等资料为依据,开展渤海海域渤中C地区异常高压特征和成因、低渗储层特征及异常高压对成岩作用影响的研究。结果表明:沙河街组地层发育异常高压系统(压力系数1.25~1.56),上覆及内部烃源岩生烃及沙河街组岩层中黏土矿物成岩作用是沙河街组地层超压的主要成因机制。沙河街组储层整体具有中低孔、低渗特低渗的特征,地层异常高压对储层质量的影响具体表现在:1抑制压实作用的进行,有利于储层原生孔隙的保存;2有助于酸性流体进入,对储层发生溶蚀改造;3有助于储层微裂缝的形成,为酸性流体提供通道并加强长石的溶蚀作用;4使得碳酸盐胶结物及伊利石大量发育,不利于有机酸对储层的大规模溶蚀改造。因此,沙河街组储层相对高孔渗带主要发育在原始沉积条件下粒度相对较粗、分选较好的砂岩中。

关键词(KeyWords)： 中深层油气藏;异常高压;储层质量;古近系;渤南低凸起

Abstract:

Keywords:

基金项目(Foundation): 国家重大专项课题“近海隐蔽油气藏勘探技术”(编号:2011ZX05023-002);; 中国海洋石油总公司科技攻关项目“渤海典型低孔低渗油藏勘探开发关键技术研究与实践”(编号:CNOOC-KJ125ZDXM07LTDTJ02)

作者(Author): 周军良,胡勇,何康,陈红兵,何逸凡

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