处理解释一体化技术在东道海子凹陷滴南地区油气勘探中的应用  

Integrated processing and interpretation technology applied in oil and gas exploration in Dinan area,Dongdaohaizi Depression

作　　者：冷雪梅 潘龙[1] 林娟[1] 阿力甫江 李晓峰[1] 马晶晶[1] LENG Xuemei;PAN Long;LIN Juan;Alifujiang;LI Xiaofeng;MA Jingjing(Institute of Geophysics,Research Institute of Exploration and Development,Xinjiang Oilfield Company,PetroChina,Urumqi,Xinjiang,830013,China)

机构地区：[1]中国石油新疆油田分公司勘探开发研究院地球物理研究所,新疆乌鲁木齐830013

出　　处：《石油地球物理勘探》2022年第S02期168-174,232-233,共9页Oil Geophysical Prospecting

基　　金：国家重大专项“准噶尔前陆冲撞带油气成藏、关键勘探技术及新领域目标优选”(2016ZX05003-005)资助

摘　　要：东道海子凹陷是准噶尔盆地的富烃凹陷,由于地震资料信噪比低、分辨率不足、多次波尤其发育,导致处理成果存在地层接触关系不清、小断裂难以识别、优质储层预测困难等问题,严重制约该区油气勘探。针对以上问题,本文利用处理解释一体化技术,通过GeoEast叠前多域分频去噪和井震联合多次波压制技术提高信噪比;采用层约束低频弱信号恢复技术和变步长预测反褶积技术有效拓宽频带,提升目的层资料分辨率;以井约束下的速度建场及偏移成像提升成果资料品质,断裂刻画效果得到明显改善;应用模型参数互补横波预测叠前反演技术,进一步显著提升了目的层优质储层预测精度。该套复合技术为东道海子凹陷地质研究提供了可靠资料保证,支撑滴南地区多口井位部署,已钻滴南14井和滴南15井均获百吨/日的高产工业油流。Dongdaohaizi Depression is a hydrocarbon-rich depression with abundant oil and gas resources in the Junggar Basin.Due to the low signal-to-noise ratio of seismic data,insufficient resolution and multiples development,processing results have problems of unclear stratigraphic contact,difficult identification of small faults,and difficult prediction of high-quality reservoirs,which seriously restricts the oil and gas exploration in this area.Therefore,this paper employs integrated processing and interpretation technology to increase the signal-to-noise ratio by the GeoEast prestack denoising and frequency division in multi-domain and the multiples suppression technology integrating logging and seismic data.Layer-constrained low-frequency weak signal recovery technology and variable step-length predictive deconvolution technology are adopted to effectively broaden the frequency band and improve the resolution of the target layer data.The fault description is significantly improved via velocity field building and migration imaging under well constraints.At the same time,the pre-stack inversion technology of model parameters with shear wave prediction,thereby significantly improving the prediction accuracy of high-quality reservoirs in the target layer.The integrated technology provides a reliable data guarantee for the geological research of the Dongdaohaizi Depression and supports the deployment of several wells in the Dinan area.The drilled Dinan 14 and Dinan 15 wells both achieve a high industrial oil flow of 100 tons per day.

关 键 词：东道海子凹陷 一体化技术 高分辨率 多次波 储层预测 

分 类 号：P631[天文地球—地质矿产勘探]