摘要
表生期岩溶作用是碳酸盐岩储层次生孔洞形成的重要成岩作用之一,直接影响孔洞缝的发育演化和有效性。在岩心观察和地质认识的基础上,充分利用常规测井和成像测井资料,提取岩溶作用的各种直接或间接特征标志,从研究岩溶的选择性、方向性、溶蚀与充填性、期次性、分带性和非均质性等“六性”关系出发,利用岩溶特征之间的成因联系,建立岩溶特征的测井识别方法,进行岩溶作用的测井解释,揭示岩溶作用下裂缝和溶蚀孔洞的各种表现特征和发育分布规律。在此基础上,利用综合测井资料研究岩溶裂缝和孔洞的测井评价方法,评价岩溶缝洞的有效性。通过以上研究,形成了用测井资料综合识别岩溶特征和解释岩溶储层的方法。在川中地区灯影组的应用表明,该方法对于岩溶相带划分、孔洞缝的非均质性、储层发育分布特征以及储层有效性的评价有较好的效果。同时该成果对于地质工作者恢复岩溶地貌、研究岩溶储层的发育演化规律、以及指导水平井的地质建模和产能预测有重要参考价值。
Supergene karstification is one of the most important diagenesis for the formation of secondary pores in carbonate reservoirs,which directly affects the development,evolution and effectiveness of pores and fractures.On the basis of core observation and geological knowledge,this paper makes full use of conventional logging and imaging logging data to extract various direct or indirect characteristics of karstification.Starting from the study of“six characteristics”of karst,such as selectivity,directionality,dissolution and filling characteristics,periodicity,zonation and heterogeneity.This paper uses the genetic relationship between karst characteristics to establish karst characteristics.The log interpretation of karstification is carried out by using the log identification method based on this,the various performance characteristics and development distribution rules of fractures and dissolution cavities under karstification are revealed.On basis of this,the comprehensive logging data are used to both study the log evaluation method and evaluate the effectiveness of karst fractures and vugs.Through the above research,formed the method of comprehensive identification of karst characteristics and interpretation of karst reservoir with logging data.The application of the results in Dengying formation of sinian system in central Sichuan area shows that the method has good application effect on the division of karst facies belt,the development and distribution characteristics of pore fracture heterogeneous reservoir and log evaluation of effectiveness.At the same time,the results have important reference value for geologists to restore karst landform,study the development and evolution of karst reservoir,guide the geological modeling and productivity prediction of horizontal wells.
作者
张树东
王兴志
任兴国
熊宇
林伟川
胡洋
ZHANG Shudong;WANG Xingzhi;REN Xingguo;XIONG Yu;LIN Weichuan;HU Yang(Southwest Branch, China National Logging Corporation, Chongqing 400021, China;School of Geoscience and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, China;Geological Exploration and Development Research Institute, Chuanqing Drilling Engineering Company Limited, China National Petroleum Corporation, Chengdu, Sichuan 610051, China;Geological Research Institute, China National Logging Corporation, Xi’an, Shaanxi 710077, China;Well Logging Key Laboratory, China National Petroleum Corporation, Xi’an, Shaanxi 710077, China)
出处
《测井技术》
CAS
2022年第3期274-282,共9页
Well Logging Technology
基金
国家科技重大专项“四川盆地大型碳酸盐岩气田开发示范工程”(2016ZX05052)。
关键词
碳酸盐岩
岩溶作用
成像测井解释
岩溶相带
岩溶“六性”关系
储层有效性
carbonate rock
karstification
imaging log interpretation
karst facies belt
karst“six characteristics”relationship
reservoir effectiveness
作者简介
第一作者:张树东,男,1966年生,正高级工程师,博士,从事碳酸盐岩和页岩油气测井解释、随钻地质导向工作。E-mail:zhangsd-007@163.com;通信作者:熊宇,女,1984年生,本科,从事测井解释工作。E-mail:xiongyu_cj@cnpc.com.cn。
