石油实验地质2017，Vol.39Issue(4)：491-497,7.DOI:10.11781/sysydz201704491
川西龙门山前雷口坡组四段储层特征及形成机理
Reservoir characteristics and formation mechanism of the 4th member of the Leikoupo Formation in Longmen Mountain front
摘要
Abstract
Over one hundred meters of tidal-flat facies dolomite with dissolution-pores developed in the Middle Triassic Leikoupo Formation in the Longmen Mountain front in the western Sichuan Basin.It can be further divided into the upper and lower reservoirs.The analyses of well cores, debris, thin sections and physical properties show that the properties of the lower reservoir, dominated by superposed dolomites, are better than those in the upper reservoir, dominated by limestones.The reservoir formation mechanism was studied using SEM and inclusion homogenization temperature analyses based on rock physical property statistics and reservoir space characteristics.Dolomitization, dissolution in the penecontemporaneous period and dissolution during the burial period formed this good reservoir.Widely distributed dolomites, which developed in a tidal-flat facies, established an important foundation for a steady distribution of reservoirs, dissolution in the penecontemporaneous period determined the formation and distribution of good reservoirs, and dissolution in burial period was favorable for the retention of pores and the increase in permeability, further improving reservoir quality.关键词
储层/白云岩/潮坪相/雷口坡组四段/中三叠统/龙门山前/川西Key words
reservoir/dolomite/tidal-flat facies/4th member of Leikoupo Formation/Middle Triassic/Longmen Mountain front/western Sichuan Basin分类
能源科技引用本文复制引用
王琼仙,宋晓波,王东,隆轲..川西龙门山前雷口坡组四段储层特征及形成机理[J].石油实验地质,2017,39(4):491-497,7.基金项目
中国石化"十条龙"重大科技攻关项目(P16092)资助. （P16092）
