准噶尔盆地阜东斜坡头屯河组二段储层自然产能控制因素分析
网络出版日期: 2014-04-06
基金资助
中国石油新疆油田分公司项目“准东阜东及西泉地区侏罗系头屯河组储层对比研究”(编号:C4006-2012)资助
Controlling factors for natural productivity of the second member of Toutunhe Formation in eastern Fukang slope, Junggar Basin
Online published: 2014-04-06
阜东斜坡头屯河组是新疆油田重要的岩性圈闭勘探层系之一。 大多数钻井在头屯河组二段储层试油获得高产,但压裂改造后产油量迅速衰减,甚至未见油,一定程度上制约了油气藏的深化勘探。 因此,关于压裂前后自然产能存在较大差异的原因剖析就显得尤为重要和紧迫。 利用钻井、测井、岩心、试油及分析化验等资料进行了综合研究,结果表明:沉积微相、凝灰质岩屑含量、黏土矿物相对含量、孔喉半径、储层敏感性和地层压力是控制阜东斜坡单井储层自然产能高低的关键因素;高含量的伊/蒙混层包膜削弱了水敏伤害,加上弱酸敏、弱速敏和较大的平均孔喉半径,是直接导致阜东斜坡头屯河组二段储层自然产能高的主要原因。 上述研究为深化准噶尔盆地阜东斜坡头屯河组岩性油气藏勘探提供了重要的理论依据和生产指导。
李苗苗 , 马素萍 , 夏燕青 , 张晓宝 . 准噶尔盆地阜东斜坡头屯河组二段储层自然产能控制因素分析[J]. 岩性油气藏, 2014 , 26(2) : 9 -14 . DOI: 10.3969/j.issn.1673-8926.2014.02.002
The Toutunhe Formation in eastern Fukang slope is one of the most important exploration layers of lithologic traps for Xinjiang Oilfield Company. Most drilling oil production tests show that the reservoir of the second member of Toutunhe Formation is high yield oil layer. However, if they were reformed by fractures, the oil yield decreased rapidly, even cannot see any oil, which restricts the further exploration in reservoir to some extent. Therefore, it is of importance and urgency to analyze how the fracture can make natural productivity differently. Trough the comprehensive research of drilling, logging, lithology, oil production test and analysis assay data, this paper suggested that: sedimentary microfacies, contents of tuffaceous fragments, relative content of clay minerals, radius of pore throat, reservoir sensitivity and strata pressure are the key factors to control reservoir natural productivity of single well in Fudong slope. High content of illite and smectite mixed layer coating, which weakens the water sensitivity damage, the weak acid and velocity sensitivity, and the average radius of the pore throat, those are the main reasons caused the high productivity in the second member of Toutunhe Formation in eastern Fukang slope. This study will provide important theoretical foundation and production instruction for the further lithologic reservoir exploration of Toutunhe Formation in eastern Fukang slope.
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