摘要
准噶尔盆地东部吉木萨尔凹陷二叠系芦草沟组发育大套致密油层,由于岩性复杂,碎屑岩和碳酸盐岩层薄且频繁交替,加之水平井钻井工艺复杂和水平段长,致使岩屑细小,影响了常规地质录井岩性鉴定、地层划分及水平井地质导向的准确性。钻探现场利用碳酸盐岩分析仪获取岩屑中方解石和白云石的矿物含量,结合区域地质、油气显示和实钻地层岩性特征进行层位卡取,采取连续分析碳酸盐岩含量的变化特征、结合优质储集层油气显示特征和岩性特征的方法指导水平井地质导向。现场十余口井的实际应用表明,碳酸盐岩分析在吉木萨尔凹陷致密油勘探中可作为岩性识别、地层卡取和水平井地质导向的一种有效录井方法。
Lucaogou formation developed large sets of tight oil reservoirs in Permian System of Jimusaer Depression in the east of Junggar Basin.The complex lithology,thin fragmental and carbonate layers and their frequent alternating,the complex drilling technology for horizontal wells and long horizontal section resulted in small cuttings,which affects the accuracy in lithology identification of the conventional geological logging,the stratigraphic division and horizontal well geosteering.On the drilling site,the mineral content of calcite and dolomite in cuttings was obtained with carbonate analyzer,horizons can be determined by combining with regional geology,oil and gas shows and lithologic characteristics of the drilled strata. Horizontal well geosteering is guided by taking continuous analysis of varying features in the content of carbonate rocks,combining with oil and gas showing and lithology characteristics of high-quality reservoirs.The on-site application of more than ten wells showed that the carbonate analysis can be used as an effective mud logging method for lithology identification,horizon determination and horizontal well geosteering in the process of tight oil exploration of Jimusaer Depression.
出处
《录井工程》
2014年第4期22-25,101,共4页
Mud Logging Engineering
基金
中国石油集团西部钻探工程有限公司科研项目"致密油录井评价技术研究"(编号2013XZ302)
关键词
准噶尔盆地
碳酸盐岩分析
吉木萨尔凹陷
致密油
岩性定名
卡层
地质导向
Junggar Basin,carbonate analysis,Jimusaer Depression,tight oil,lithology naming,horizon determination,geosteering
作者简介
李秀彬,工程师，1983年生，2006年毕业于成都理工大学资源勘查专业，现在巾国石油西部钻探克拉玛依录井工程公司长期从事现场录外和管理工作。通信地址：834000,新疆克拉玛依市南新路2号。电话：（0990）6840440。E—mail：lexiub@cnpc．com．cn
