武隆地区页岩储集层评价及水平井箱体优选  

Shale reservoir evaluation and horizontal well box optimization in Wulong area

作　　者：韩贵生 张海杰 田艳红 庞江平 王君 HAN Guisheng;ZHANG Haijie;TIAN Yanhong;PANG Jiangping;WANG Jun(Research Institute of Geologic Exploration & Development of CNPC Chuanqing Drilling Engineering Company Limited, Chengdu,Sichuan 610000;Chongqing Shale Gas Exploration and Development Co., Ltd., Chongqing 400000, China;Sichuan Chuanye 605 Environment Protection Engineering Co., Ltd., Chengdu, Sichuan 610036, China)

机构地区：[1]中国石油川庆钻探工程有限公司地质勘探开发研究院,四川省成都市610000 [2]重庆页岩气勘探开发有限责任公司 [3]四川省川冶陆零伍环保工程有限公司

出　　处：《录井工程》2020年第2期86-90,共5页Mud Logging Engineering

摘　　要：为探索、评价和开发浅层页岩气资源,以重庆武隆地区五峰组-龙马溪组页岩储集层为研究对象,通过岩心分析等资料,明确了武隆地区优质页岩储集层各小层非均质性较强。五峰组-龙一13小层表现出TOC、孔隙度、脆性矿物含量、含气量均高的特点,其中又以五峰组和龙一11小层最佳,且随深度增大,页岩储集层各项参数有变好的趋势,只有龙一14小层页岩储集层各项参数略差。根据储集层静态评价参数进行初步分类,赋以权重系数,计算出综合品质,按综合品质将页岩储集层分为I类、Ⅱ类和Ⅲ类,并优选出水平井箱体武隆地区五峰组中上部-龙一13小层均为Ⅰ类页岩储集层,垂向厚度达29 m;武隆地区水平井箱体高度设计为5 m,箱体以龙一11小层为主,包括五峰组顶部及龙一12小层底部,水平箱体中心线设置在龙一11小层最高自然伽马(GR)值处,在水平段钻进中依据GR曲线特征指导地质导向和地层追踪,从而确保水平段轨迹在龙一11小层和最优储集层内穿行,以期获得较高水平井产能。In order to explore,evaluate and develop shallow shale gas resources,the shale reservoirs from Wufeng Formation to Longmaxi Formation in Chongqing Wulong area are taken as the research objects.Through core analysis and other data,it is clear that each subzone of high-quality shale reservoirs in Wulong area has strong heterogeneity.Wufeng Formation-subzone 3 of Sub-Member 1 of the Longmaxi Formation shows the characteristics of high TOC,porosity,brittle mineral concentration and gas concentration,among which Wufeng Formation and subzone 1 are the best.With the increase of depth,the parameters of the shale reservoirs tend to get better,while the parameters of the shale reservoir in subzone 4 are slightly worse.According to the reservoir static evaluation parameters,the shale reservoirs are classified preliminarily,and the weight coefficient is assigned to calculate the comprehensive quality.The shale reservoirs are divided intoⅠ,ⅡandⅢtypes based on the comprehensive quality,and the horizontal well box is optimized.The middle and upper parts of the Wufeng Formation-subzone 3 in Wulong area isⅠtype shale reservoir with a vertical thickness of 29 meters.The design height of the horizontal well box in Wulong area is 5 m,and the box is dominated by subzone 1,including the uppermost part of the Wufeng Formation and the bottom of subzone 2.The central line of the horizontal box is set at the highest GR value of subzone 1.In the drilling of horizontal section,the geosteering and formation tracing are guided according to the characteristics of GR curve,so as to ensure that the trajectory of the horizontal section through subzone 1 and optimum reservoir to obtain higher horizontal well productivity.

关 键 词：武隆地区 页岩 储集层 水平井箱体 综合品质 TOC 孔隙度 脆性 

分 类 号：TE132.1[石油与天然气工程—油气勘探]