玛北油田玛2井区地质特征及开发措施分析  

Analysis of Geological Characteristics and Development Measures of Ma2 Well Block in Mabei Oilfield

作　　者：赵号晋 白佳帅 王立伟[1] 雷声[1] 陈玉[1] Zhao Haojin;Bai Jiashuai;Wang Liwei;Lei Sheng;Chen Yu(PetroChina Xinjiang Oilfield Company,Karamay Xinjiang 834000)

机构地区：[1]中国石油新疆油田分公司,新疆克拉玛依834000

出　　处：《中外能源》2024年第2期46-52,共7页Sino-Global Energy

摘　　要：随着开发的不断深入,玛2井区百口泉组油藏水平井出现压力下降快、日产量低、含水下降慢、压裂液返排率高和排液时间长等问题,且南北区域产量差异大,新投水平井井筒异常比例高于老井。在充分掌握玛2井区砂体分布、沉积特征、储层物性、裂缝特征等基础地质资料背景下,开展水平井开发措施研究,评价影响玛2井区水平井产能的主控因素,对比分析不同施工参数条件下油层缝网扩展规律。先导试验区开发效果较明显,南区5口典型井平均日产油16.32m^(3)/d,北区5口典型井平均日产油15.47m^(3)/d,南区典型井的裂缝规模、有效改造体积更大。同时开发措施仍需进一步改进,包括优化水平井压裂开发簇数和簇间距、水平井段簇优化及施工参数优选等。玛2井区具有开展小井距开发试验的基础,建议井距在150~200m,水平段长在1400m左右,簇间距在20m左右。With the continuous development of the production,the horizontal wells in the Baikouquan Forma-tion oil reservoirs in the Ma2 well block have encountered problems such as rapid pressure drop,low daily production,slow water cut decrease,high fracturing fluid backflow rate,and long drainage time.Moreover,there is a significant difference in production between the north and south regions,and the abnormal proportion of wellbore in new horizontal wells is higher than that in old wells.Based on a full understanding of the basic geological data such as the distribution of sand bodies,sedimentary characteristics,reservoir physical proper-ties,and fracture characteristics in the Ma2 well block,development measures for the horizontal wells are re-searched,main control factors that affect the productivity of horizontal wells in the Ma2 well block are evalu-ated,and the expansion rule of fracture network in oil layers under different construction parameters is com-pared and analyzed.The development effect of the pilot test area is obvious.The average daily oil production of the five typical wells in the southern block is 16.32m^(3)/d,and that of the five typical wells in the north-ern block is 15.47m^(3)/d.The fracture scale and effective stimulation volume of the typical wells in the south-ern block are larger.At the same time,development measures still need to be further improved including opti-mizing the number and spacing of horizontal well fracturing development clusters,optimizing horizontal well section clusters,and selecting construction parameters.The Ma2 well block has the basis for carrying out de-velopment tests with small well spacing.It is suggested that the well spacing is 150-200m,the horizontal sec-tion length is about 1400m,and the cluster spacing is about 20m.

关 键 词：水平井压裂 裂缝特征 缝网扩展规律 簇间距 井距 有效改造体积 

分 类 号：TE34[石油与天然气工程—油气田开发工程] P618.13[天文地球—矿床学]