摘要
为了有效评价砾岩致密油藏“甜点”分布,针对砾岩致密油藏非均质性强、油水分布复杂、“甜点”识别困难等问题,对风南4井区砾岩致密样品孔隙度、含油饱和度开展地层条件下的恢复校正,并结合阿尔奇公式以及动态地层水电阻率评价模型建立相应的孔隙度与含油饱和度测井评价模型;在此基础上,通过构建含油孔隙度参数,刻画单井垂向含油非均质性从而实现砾岩致密油藏地质“甜点”测井评价。研究结果表明:相比于地表检测值,地层条件下孔隙度减少约12.5%,含油饱和度增加9.3%左右;砾岩油藏“甜点”主要分布在T1b21及T1b3段,以II类“甜点”为主,其次为I类“甜点”。地质“甜点”的识别与评价可为玛湖地区砾岩致密油藏井位部署及水平井轨迹优化提供参考。
In order to effectively evaluate the distribution of“sweet spots”in conglomerate tight reservoirs,the problems of high heterogeneity of conglomerate tight reservoirs,complex oil and water distribution,and difficulty in identifying“sweet spots”were dealt with.The porosity and oil saturation of conglomerate tight samples in Fengnan 4 play were recovered under formation conditions.Combined with the Archie formula and the dynamic formation water resistivity evaluation model,the porosity and oil saturation log evaluation models were established.On this basis,by constructing oil-bearing porosity parameters,the vertical oil-bearing heterogeneity of single wells were characterized,and the geological“sweet spots”of conglomerate tight reservoirs were evaluated.The results show that the porosity decreases by about 12.5%and the oil saturation increases by about 9.3%compared to the laboratory test results under surface conditions.The“sweet spots”of conglomerate reservoirs lie in T1b21 and T1b3 of the Baikouquan Formation in Fengnan 4 play,mainly developing type II“sweet spots”,followed by type I“sweet spots”.The identification and prediction of geological“sweet spots”in the study area provide references for well location deployment and horizontal well trajectory optimization of conglomerate tight reservoirs in the Mahu area.
作者
焦晨雪
王民
高阳
黄文彪
卢双舫
关莹
钱根葆
覃建华
周能武
田伟超
汪志璇
徐建鹏
JIAO Chenxue;WANG Min;GAO Yang;HUANG Wenbiao;LU Shuangfang;GUAN Ying;QIAN Genbao;QIN Jianhua;ZHOU Nengwu;TIAN Weichao;WANG Zhixuan;XU Jianpeng(School of Geosciences and Technology,China University of Petroleum(East China),Qingdao 266580,China;Research Institute of Petroleum Exploration and Development,Xinjiang Oilfield Company,PetroChina,Karamay 834000,China;Xinjiang Oilfield Company,PetroChina,Karamay 834000,China)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第1期112-125,共14页
Journal of Central South University:Science and Technology
基金
中央高校自主创新科研计划项目(18CX02070A)
国家自然科学基金资助项目(41672116)
国家科技重大专项(2017ZX05070001)
中央高校基本科研业务费专项资金项目(17CX05012)~~
关键词
砾岩致密油藏
地质“甜点”
测井评价
含油非均质性
玛湖凹陷
conglomerate tight reservoir
geological“sweet spot”
log evaluation
oil-bearing heterogeneity
Mahu Sag
