摘要
影响惠民凹陷古近系砂岩储集层物性主要因素有沉积条件、压实、碳酸盐胶结和溶蚀作用。沉积条件对物性的影响主要表现在对原生孔隙的发育程度和对溶蚀、胶结等成岩作用的控制方面；压实作用对孔隙度的影响主要表现在埋藏早期或碳酸盐胶结程度低的阶段，埋深每增加1000m，孔隙度降低约8％～9％；胶结作用对储集层性质影响与成岩演化阶段有关，成岩演化程度越高，胶结对物性的影响越大；溶蚀作用对储集层性质改善很大，产生的次生孔隙最大可达20％。溶蚀作用在宏观上受区域构造背景和生油洼陷平面位置控制，断层较发育和临近生油中心（临南洼陷）的南部斜坡带和中央隆起带溶蚀最发育；微观上受岩石的粒度、分选及杂基含量控制，粒度越粗、分选越好、杂基越少的砂岩溶蚀作用越强。
Paleogene sandstone reservoir quality in the Huimin sag is mainly controlled by its compaction, carbonate cementation, dissolution and depositional environment. The evaluation to these factors suggests that： （1）The porosity decreases by 8% to 9% per 1 000 m depth increasing due to compaction at shallow burial depth or during low diagenetic stage; （2）The influence of carbonate cementation is related to the diagenetic stages, greater influence is seen at higher diagenetic stages;（3）Dissolution plays an important role in controlling the reservoir quality. Secondary porosity from dissolution is up to 20%. However, the dissolution is mainly controlled by the regional tectonic setting and the planar position of the hydrocarbon producing depression, and the dissolution lis relatively stronger in the south slope zone nearby the hydrocarbon producing depression and in the nniddle up-lift zone characterized by faults development. Coarse, well sorted and low matrix sandstones often underwent heavy dissolution.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2007年第1期105-111,共7页
Journal of Jilin University：Earth Science Edition
基金
国家"十五"重大科技攻关项目(2001BA605A09)
关键词
惠民凹陷
储层物性
控制因素
Huimin sag
reservoir quality
controlling factors
