摘要
鄂尔多斯盆地马家沟组中下组合是近几年长庆油田天然气勘探重点层系,包含4套含气层系,岩石组分复杂,孔隙类型变化大,孔洞缝复合储层多,孔隙非均质性强,三孔隙度曲线对岩石孔隙度响应误差大,电阻率对储层流体性质响应弱,且不同区域含气层系不同,基于常规测井资料,难以准确判识储层是否为气层。基于阵列声波测井数据可以计算地层的泊松比、压缩系数、体积模量、拉梅常数等岩石力学参数,利用这些参数计算地层综合含气指数进行气层识别。将该方法用于长庆油田马家沟中下组合碳酸盐岩储层,识别结果与试气结论吻合,对马家沟中下组合碳酸盐岩储层的含气性具有很好的指示作用。
The middle-lower Majiagou formation in the Ordos basin is a key interval where PetroChina Changqing Oilfield Company explores natural gas in recent years.There are four gas-bearing layers which have complex composition,various pore types and composite reservoirs with pores,vugs and fractures,and high pore heterogeneity.Since the three-porosity curves deviate from actual porosity responses,the resistivity response to reservoir fluid properties is weak,and the gas-bearing layers are different in different zones,it is difficult to recognize gas layers based on conventional logging data.In this paper,rock mechanic parameters such as Poisson’s ratio,compression coefficient,bulk modulus and lame constant are calculated based on array acoustic log data,and then the comprehensive gas-bearing index is calculated for recognizing gas layers.After applying the method to the carbonate reservoirs in the middle and lower Members of the Majiagou formation,the results are in good agreement with those from gas production tests,proving it to be effective for accurately recognizing the gas-bearing carbonate reservoirs.
作者
曹先军
李国军
苗秀英
马修刚
任小锋
孙佩
CAO Xianjun;LI Guojun;MIAO Xiuying;MA Xiugang;REN Xiaofeng;SUN Pei(Technology Center, China Petroleum Logging CO. LTD., Xi’an, Shaanxi 710077, China;Changqing Branch, China Petroleum Logging CO. LTD., Xi’an, Shaanxi 710200, China)
出处
《测井技术》
CAS
2020年第2期198-203,共6页
Well Logging Technology
基金
国家科技重大专项测井交互精细融合处理平台(2017ZX05019-005)
中国石油天然气集团有限公司科学研究与技术开发项目重大工程关键技术装备研究与应用(二期)(2018E-2107)。
关键词
阵列声波测井
气层识别
岩石力学参数
综合含气指数
马家沟中下组合
array acoustic logging
recognition of gas reservoir
rock mechanic parameter
comprehensive gas-bearing index
middle-lower Majiagou formation
