中国煤炭地质
中國煤炭地質
중국매탄지질
COAL GEOLOGY OF CHINA
2014年
3期
53-58
,共6页
测井约束反演%致密砂岩%拟声波重构%自动迭代子波扫描
測井約束反縯%緻密砂巖%擬聲波重構%自動迭代子波掃描
측정약속반연%치밀사암%의성파중구%자동질대자파소묘
well logging constrained inversion%dense sandstone%quasi-acoustic wave reconstruction%automatic iterative wavelet scan-ning
“先成型”致密砂岩气的勘探重点是寻找相对高孔渗砂岩,基于该观点,以鄂尔多斯盆地东缘上古生界为研究对象,以“相控储层”为思路,结合构造、沉积等研究成果,开展测井约束反演工作,以此寻找相对高孔渗优质储层。研究区有利储层较为成功的预测表明,依据地质、测井资料,采用拟声波重构技术可有效提高测井曲线岩性识别能力,并为砂岩识别提供波阻抗门槛;利用自动迭代子波扫描求取每口井的最佳子波,实行多个子波同时参与反演,可获得初始模型与井旁地震数据的最佳匹配。另外在构建地质模型时,针对不同储层的沉积特点,选取了不同的插值方式进行分段反演,有效划分出不同层段中有利区带及最佳目的层段。
“先成型”緻密砂巖氣的勘探重點是尋找相對高孔滲砂巖,基于該觀點,以鄂爾多斯盆地東緣上古生界為研究對象,以“相控儲層”為思路,結閤構造、沉積等研究成果,開展測井約束反縯工作,以此尋找相對高孔滲優質儲層。研究區有利儲層較為成功的預測錶明,依據地質、測井資料,採用擬聲波重構技術可有效提高測井麯線巖性識彆能力,併為砂巖識彆提供波阻抗門檻;利用自動迭代子波掃描求取每口井的最佳子波,實行多箇子波同時參與反縯,可穫得初始模型與井徬地震數據的最佳匹配。另外在構建地質模型時,針對不同儲層的沉積特點,選取瞭不同的插值方式進行分段反縯,有效劃分齣不同層段中有利區帶及最佳目的層段。
“선성형”치밀사암기적감탐중점시심조상대고공삼사암,기우해관점,이악이다사분지동연상고생계위연구대상,이“상공저층”위사로,결합구조、침적등연구성과,개전측정약속반연공작,이차심조상대고공삼우질저층。연구구유리저층교위성공적예측표명,의거지질、측정자료,채용의성파중구기술가유효제고측정곡선암성식별능력,병위사암식별제공파조항문함;이용자동질대자파소묘구취매구정적최가자파,실행다개자파동시삼여반연,가획득초시모형여정방지진수거적최가필배。령외재구건지질모형시,침대불동저층적침적특점,선취료불동적삽치방식진행분단반연,유효화분출불동층단중유리구대급최가목적층단。
The prospecting stress of the“antecedent type”dense sandstone gas is to find relatively high percolation sandstone. Based on this point of view, taking the Upper Paleozoic strata in eastern Ordos Basin as the subject investigated, considering“facies con-trolled reservoir”, combined with structural and sedimentary research findings, carried out well logging constrained inversion to find rel-atively high percolation quality reservoir. Successful prediction of favorable reservoirs in the study area has shown that based on geolog-ical and well logging data, using quasi-acoustic wave reconstruction technology can improve logging trace lithologic identification abili-ty effectively and provide wave impedance threshold for sandstone identification. Using automatic iterative wavelet scanning to get the best wavelet in every well and practiced multiple wavelets participation in inversion simultaneously, thus can obtain optimum matching of the initial model and well-side seismic data. Besides, during geological modeling, in allusion to sedimentary features of different res-ervoirs, selecting different interpolation pattern and carrying out sector inversion in order to identify favorable zones and optimum tar-gets in various sectors effectively.