基于测井和地震技术变质岩潜山岩性识别与预测

Identification and prediction of metamorphic buried hill lithology based on logging and seismic technology

 黄凤祥 2 夏振宇³ 马秀玲⁴ 赵伟⁴ 桂志先 2 汪勇 2

长江大学油气资源与勘探技术教育部重点实验室，湖北 武汉 430100 长江大学地球物理与石油资源学院，湖北 武汉 430100 江西省页岩气投资有限公司，江西 南昌 330000 中国石油集团长城钻探工程有限公司测井公司，辽宁 盘锦 124011）

MOE Key Laboratory of Exploration Technologies for Oil and Gas Resources, Yangtze University, Wuhan 430100, China School of Geophysics and Oil Resources, Yangtze University, Wuhan 430100, China Jiangxi Shale Gas Investment Company Ltd., Nanchang 330000, China Logging Company, Great Wall Drilling Company Ltd., CNPC, Panjin 124011, China

 变质岩潜山油藏中岩性识别是判别储层的前提，可靠而有效地利用测井与地震技术能识别和预测潜山变质岩各岩性发育区。DMT凹陷潜山岩性主要为混合岩类、浅粒岩类、变粒岩类、片麻岩类、角闪岩类及基性侵入岩类等。根据该区岩石学薄片分类鉴定结果，各岩石在矿物成分及体积分数上的不同，致使各岩石发育处常规测井GR，CNL，DEN曲线形态与数值表现出差异，该差异性可作为岩性定性和定量识别的依据。在地震岩性预测方面，根据不同岩性地震属性的差异，可初步进行基性侵入岩的识别；进一步以敏感测井曲线交会图版为参考，采用密度曲线重构声波反演技术，开展变质岩岩性地震反演预测，其岩性预测结果与储层实钻吻合率达到85%以上，预测效果较好，对该类油气藏勘探及开发具有借鉴意义。

 Lithology identification of metamorphic buried hill reservoir is a prerequisite for determining reservoir. Reliable and effective use of logging technology and seismic technology can identify and predict each hill metamorphic rock development area. In DMT depression hill, the main rocks are migmatite, leucoleptite, leptite, gneiss, amphibolite, mafic intrusive rocks, and the like. According to the petrographic sheet identification in the district, differences of the rock mineral compositions and contents result in curve shape and numerical differences of various rocks at conventional GR, CNL, DEN logging curves, which could be used as the basis of lithology qualitative and quantitative identification. In the prediction of seismic lithology, according to the differences in lithological seismic attributes, mafic intrusive rocks can initially be identified. Further, taking the sensitive log chart as a reference, adopting the mature technology curve and inversion, seismic inversion prediction of metamorphic rock is conducted. The reservoir lithology prediction is 85% consistent with the actual drilling, which provides a reference to the exploration and development of this type oil and gas reservoir.

10.6056/dkyqt201606008