黄骅坳陷北大港构造带储集层成岩作用定量研究  

Quantitative study on reservoir diagenesis in Northern Dagang Structural Belt,Huanghua Depression

作　　者：金振奎[1] 刘春慧[1] 

机构地区：[1]中国石油大学(北京)资源与信息学院

出　　处：《石油勘探与开发》2008年第5期581-587,共7页Petroleum Exploration and Development

基　　金：国家重点基础研究计划"973"项目"中国典型叠合盆地油气成藏机制与分布规律"(2006CB202300)

摘　　要：黄骅坳陷北大港构造带砂岩储集层经历了压实、胶结、溶蚀和交代等多种成岩作用。根据不同接触类型颗粒相对含量，将压实作用强度定量划分为6级，研究区储集层属中等压实（Ⅲ级）和中强压实（Ⅳ级）。胶结作用主要有石英次生加大胶结、方解石胶结、黏土矿物胶结。石英次生加大的形成深度主要在2200～3300m；方解石胶结物主要为亮晶方解石，利用阴极发光、包裹体测温、碳氧同位素等分析手段确定亮晶方解石沉淀的深度主要在2300～3100m；自生黏土矿物充填于孔隙中，其分布规律与埋藏深度密切相关。溶蚀作用主要包括长石颗粒、方解石胶结物的溶蚀。压实作用主要与埋藏深度、砂岩成分、胶结物等有关，胶结物的沉淀与黏土矿物转化有关，溶蚀作用与有机质热演化有关。Sandstone reservoir experienced diagenesis of compaction, cementation, dissolution and replacement in Northern Dagang Structural Belt. The compaction intensity is quantitatively classified into 6 grades according to the relative content of grains with different types of grain-contact. Compaction of the sandstone reservoir in the study area is from moderate （grade Ⅲ） to moderate-intensive （grade Ⅳ）. Cementation includes quartz overgrowth, calcite cementing and clay mineral cementing. The quartz overgrowth occurs from 2 200 - 3 300 m. Calcite cement is calcsparite. The precipitation depth of caleite cement is determined to be 2 300 to 3 100 meters using eathodoluminescence, inclusion thermometry, etc. The authigenic clay mineral fills in the pores. Its distribution is related to burial depth. Dissolution includes corrosion of detrital feldspar and calcite cement. Compaction is related to burial depth, sandstone composition and cementation, cement precipitation is related to transformation of clay minerals, and dissolution results from thermal evolution of organic matter.

关 键 词：黄骅坳陷 北大港构造带 砂岩储集层 成岩作用 定量研究 

分 类 号：TE122.2[石油与天然气工程—油气勘探]