孟美辰,刘传玉,王彦春
MENG Meichen,LIU Chuanyu,WANG Yanchun

• 1:中国地质大学(北京)地球物理与信息技术学院
• 2:"地下信息探测技术与仪器"教育部重点实验室(中国地质大学)
• 3:大庆油田有限责任公司钻探集团钻井三公司

摘要(Abstract)：

沁水盆地南部煤系地层的孔隙结构复杂,属低孔、低渗、非常规的薄储层,单一的弹性参数无法较好地满足煤系地层游离气和吸附气的识别。基于测井岩石物理参数,找出与游离气和吸附气关联度较高的多个敏感参数,利用敏感参数进行双参数交会分析。结果表明:泊松比和体积模量对游离气的识别最敏感,纵波阻抗和体积模量对吸附气的识别最敏感;叠前弹性参数反演得到的敏感弹性参数划分出了有利游离气勘探区和吸附气富集区。有利区与实际钻井资料吻合度较高,有效地识别游离气和吸附气,为实现煤系地层游离气与吸附气共同开采提供了新思路。
Coal-measure strata in South Qinshui Basin have the characteristics of complicated pore structures;belong to the thin reservoirs with low porosity,low permeability and unconventional conditions,so the single elastic parameter can not satisfy the identifications of the free and absorbed gases in the formations.Based on the well logging petrophysical parameters,several sensitive parameters which have high correlation with the free and absorbed gases are found out.And moreover with the help of these sensitivity parameters,the two-parameter crossplot analyses are conducted.The achievements show that the Poisson's ratios and bulk modulus possess the most sensitive to the identification of the absorbed gas;the elastic parameters with the sensitivity obtained from the prestack elasticinversion can classify and detect favorable free gas exploration area and absorbed gas enrichment region.There are much high coincidence between the above favorable blocks and actual drilling data,thus two kinds of the gas stated above can be effectively identified,and moreover provide the new thought for the co-production of the free and absorbed gases in the coal measure strata.

关键词(KeyWords)： 游离气;吸附气;泊松比;体积模量;叠前弹性反演
free gas;absorbed gas;Poisson's ratio;bulk modulus;prestack elastic inversion

Abstract:

Keywords:

基金项目(Foundation): 国家“十二五”油气田及煤层气科技重大专项专题“煤系地层游离气富集规律与分布研究”(2011ZX05033-004);; 国家高技术研究发展计划(863计划)“现代三维地震观测系统设计与多分量油气储层预测技术”(2013AA064201)

作者(Author): 孟美辰,刘传玉,王彦春
MENG Meichen,LIU Chuanyu,WANG Yanchun

参考文献(References)：

• [1]黄兆辉,邹长春,杨玉卿,等.沁水盆地南部TS地区煤层气储层测井评价方法[J].现代地质,2012,26(6):1275-1282.
• [2]梁宏斌,林玉祥,钱铮,等.沁水盆地南部煤系地层吸附气与游离气共生成藏研究[J].中国石油勘探,2011,14(2):72-78.
• [3]陈彦君.沁水盆地南部煤层气富集主控因素及富集区块优选[D].荆州:长江大学,2013.
• [4]秦勇,梁建设,申建,等.沁水盆地南部致密砂岩和页岩的气测显示与气藏类型[J].煤炭学报,2014,39(8):1559-1565.
• [5]赵贤正,杨延辉,孙粉锦,等.沁水盆地南部高阶煤层气成藏规律与勘探开发技术[J].石油勘探与开发,2016,43(2):1-7.
• [6]孙粉锦,王勃,李梦溪,等.沁水盆地南部煤层气富集高产主控地质因素[J].石油学报,2014,35(6):1070-1079.
• [7]王俊骏,桂志先,谢晓庆,等.苏里格气田储层识别敏感参数分析及应用[J].断块油气田,2013,20(2):175-177.
• [8]付斌,李进步,陈龙,等.苏里格气田西区致密砂岩气水识别方法与应用[J].特种油气藏,2014,21(3):66-69.
• [9]曲绍忠,林建东.浅谈煤层气与游离气共同开发新思路[J].中国煤炭地质,2013,25(2):64-70.
• [10]马火林,汪剑,王文娟,等.构造煤煤层气及裂隙的测井响应和敏感参数分析:以沁水盆地郑庄地区为例[J].现代地质,2015,29(1):171-178.
• [11]黄捍东,汪佳蓓,郭飞.敏感参数分析在叠前反演流体识别中的应用[J].物探与化探,2012,36(6):941-946.
• [12]边会媛,王飞,岳崇旺,等.利用弹性参数识别致密砂岩储层流体性质[J].地球科学与环境学报,2014,36(4):99-106.