摘要
辽河坳陷曙光油田杜 2 12区块沙三中亚段大凌河油层组是稠油储集层 ,因埋藏较浅而胶结疏松。根据 11口井的岩心观察和薄片分析 ,其岩性主要为砾岩、杂砂岩、中细砂岩等 ,吸附性成分 (泥岩岩屑和蚀变的长石颗粒、火成岩碎屑等 )含量高 ,黏土矿物 (以蒙脱石为主 ,伊利石、高岭石次之 )含量较高 ,结构成熟度为中等到差 ,为低稳定型砂砾岩。大凌河油层下油层组的成分成熟度、结构成熟度均高于上油层组 ,致使纵向非均质性强 ,横向非均质性相对较弱。注蒸汽开采稠油时 ,高温、高pH值的蒸汽易使储集层中的不稳定矿物发生物理、化学变化 ,导致孔、渗性下降和非均质性加剧 ,而开采速率过高会造成大量出砂。应对上、下油层组制定不同的开采方案 ,选取合理的注入液ph值、加入适量的钾离子 ,使注采液的流速不超过油层内微粒迁移的临界值。图 2表 4参
The hydrocarbon in the Dalinghe reservoir, developed within the Sha 3 sub member of Shahejie Formation in the Block Du 212, Shuguang Oilfield (Liaohe Oil area) is a heavy oil pool. Based on the information of cores and thin sections from 11 wells, the reservoir lithology is mainly gravel, greywacke, medium fine sandstone and the cement is loose. The reservoir contains high caulking stuff content, which is mainly clay mineral among which the montmorillonite content is highest. The lower oil formation is superior to the upper formation as to composition maturity and texture maturity, and the clay mineral content in the upper formation is higher than that in the lower formation. When the oil field has been being developed, the progress should be selected as matching pH of the injected fluid, adding certain K + , taking moderate injection production rate would not be higher than the critical value of the migrating micro grain within the oil formation.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2003年第4期95-97,共3页
Petroleum Exploration and Development
关键词
辽河油田
大凌河组
稠油油藏
储集层
岩矿特征
黏土矿物
非均质性
Liaohe Oilfield
Dalinghe Formation
heavy oil reservoir
resenvoir
lithology
clay mineral
heterogeneity
