考虑基质孔缝特征的湖相致密灰岩类型划分——以四川盆地中部侏罗系自流井组大安寨段为例

发布时间：2018-02-24 23:32

本文关键词： 致密灰岩基质孔缝岩石类型物性含油性产能特征大安寨段侏罗系　出处：《石油勘探与开发》2017年02期 　论文类型：期刊论文

【摘要】：为提高致密储集层甜点预测的准确度与精度,根据储集层基质孔缝特征及其与岩石组构的关系,将四川盆地中部侏罗系自流井组大安寨段岩性进行细分,据此讨论不同岩性的物性、含油性特征及其对产能特征的影响。大安寨段灰岩中发育大量、多类型的微—纳米孔缝。以介壳为主的生屑、方解石/白云石晶粒以及硅酸盐矿物为影响储集层基质孔缝的三端元组构。据此将研究区灰岩划分为10种类型,每种岩石类型对应独立的沉积成岩演化史和孔缝特征。含硅介壳灰岩、含泥介壳灰岩等储集性好;介屑灰岩、泥粉晶介屑灰岩渗流能力强;含泥介壳灰岩含油性好;含硅、含云、含泥介壳灰岩可增加单井产量。岩性差异是造成大安寨段单井产能差异的重要原因。
[Abstract]:In order to improve the accuracy and accuracy of prediction of dense reservoirs, according to the characteristics of reservoir matrix pore fractures and their relationship with rock fabric, the lithology of the Dan'anzhai member of Jurassic self-flowing well formation in the central Sichuan Basin is subdivided. The physical and oil-bearing characteristics of different lithology and their influence on productivity characteristics are discussed. A large number of micro- and nano-pore fractures are developed in limestone of the Da'anzhai section. Calcite / dolomite grains and silicate minerals are the three-terminal fabric that affect the pore fractures of the reservoir matrix. According to this, the limestone in the study area can be divided into 10 types. Each type of rock corresponds to an independent history of sedimentary diagenesis and pore fracture characteristics. The silicon-bearing and argillaceous limestone have good reservoir properties; the percolation ability of mesozoic limestone and argillaceous mesolithite is strong; the mud-bearing meso-limestone has good oil content; the silicon-bearing meso-limestone has good oil content; The productivity of single well can be increased by the limestone with cloud and mud, and the difference of lithology is the important reason for the productivity difference of single well in Da'anzhai section.
【作者单位】：北京大学地球与空间科学学院;中国石油勘探开发研究院;北京大学石油与天然气研究中心;中国地质大学(北京);
【基金】：国家自然科学基金“深部碳酸盐岩油气储集层原位溶蚀模拟实验研究”(41272137) 中国石油勘探开发研究院院级项目“四川盆地侏罗系大安寨段致密油储层模式与地质综合评价研究”(2016yj01)
【分类号】：TE311

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