曾岔油区长9油层裂缝分布规律
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摘要
曾岔油区长9油层含水较高,目前仍处于笼统注水开发过程,采油效率偏低,且注采关系不对应。本文通过动态分析法和微地震裂缝监测法,对曾岔油区裂缝分布进行了初步研究,结果表明:①通过动态裂缝综合分析、微地震裂缝监测,认为曾岔油区长9油层裂缝走向集中在北东东—南西西向。②监测HW9井共计9段压裂施工,裂缝网络长度为227～367 m之间,宽度为49～124 m之间,高度38～358 m之间。③对裂缝方向上的水淹井和裂缝发育的层段进行挤封,下步可进行转注可行性的论证。
There is high water content in Chang9 oil layer in Zengcha oilfield, and it is still in the process of general water injection development. The oil recovery efficiency is relatively low, as the relationship between water injection and oil production is not corresponding. In this paper, the dynamic analysis method and microseismic crack monitoring method were used to preliminarily study the crack distribution in Zengcha oilfield. The results showed that the cracks in the Chang9 oil layer is mainly distributed in the north-east-east to south-west-west;the length of the crack network ranges from 227 m to 367 m, the width is between 49 m and 124 m,and the height is between 38 m and 358 m.
There is high water content in Chang9 oil layer in Zengcha oilfield, and it is still in the process of general water injection development. The oil recovery efficiency is relatively low, as the relationship between water injection and oil production is not corresponding. In this paper, the dynamic analysis method and microseismic crack monitoring method were used to preliminarily study the crack distribution in Zengcha oilfield. The results showed that the cracks in the Chang9 oil layer is mainly distributed in the north-east-east to south-west-west;the length of the crack network ranges from 227 m to 367 m, the width is between 49 m and 124 m,and the height is between 38 m and 358 m.
引文
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[2]赵鹏飞,葛宏选,施里宇,等.鄂尔多斯盆地樊学油区开发层系的划分与组合研究[J].非常规油气, 2015, 2(1):41-49.
[3]杨正明,张英芝,郝明强,等.低渗透油田储层综合评价方法[J].石油学报, 2006, 27(2):64-67.
[4]曾联波,李忠兴,史成恩,等.鄂尔多斯盆地上三叠统延长组特低渗透砂岩储层裂缝特征及成因[J].地质学报, 2007, 81(2):174-180.
[5]关宝文,郭建明,杨燕,等.油气储层裂缝预测方法及发展趋势[J].特种油气藏, 2014, 21(1):12-17.