CAJ | 학술논문

川西坳陷侏罗系砂岩储层具有低渗致密的特点，主要为三角洲相分流河道沉积。河道纵向叠置关系复杂、砂岩厚度薄、岩性及物性横向变化明显，但地震资料分辨率有限，河道砂岩储层预测及刻画难度大，制约着开发目标评价及井网部署。采用从宏观到微观、从定性到定量、从外形精细刻画至内幕非均质性评价逐步逼近的综合研究思路，重点集成了井－震一体化河道沉积层序识别、河道砂体叠加样式正演、相带空间刻画和递进反演相控储层定量描述等关键技术，解决了河道期次划分、叠置样式预测、外形刻画和定量描述等多个难题，实现以单河道为单元的气藏精细开发目标评价，取得了明显的应用效果，并形成了陆相致密气藏河道砂岩储层精细刻画与描述技术体系。
천서요함주라계사암저층구유저삼치밀적특점，주요위삼각주상분류하도침적。하도종향첩치관계복잡、사암후도박、암성급물성횡향변화명현，단지진자료분변솔유한，하도사암저층예측급각화난도대，제약착개발목표평개급정망부서。채용종굉관도미관、종정성도정량、종외형정세각화지내막비균질성평개축보핍근적종합연구사로，중점집성료정－진일체화하도침적층서식별、하도사체첩가양식정연、상대공간각화화체진반연상공저층정량묘술등관건기술，해결료하도기차화분、첩치양식예측、외형각화화정량묘술등다개난제，실현이단하도위단원적기장정세개발목표평개，취득료명현적응용효과，병형성료륙상치밀기장하도사암저층정세각화여묘술기술체계。
The Jurassic sandstone reservoirs in western Sichuan Depression are mainly of delta distributary channel depo -sits,featuring in tightness and low permeability .The channel sands are complex invertical superimposition ,small in thick-ness ,and large in variations of lithology and poroperm characteristics .It is difficult to predict and characterize those reser-voirs due to the limited seismic resolution ,constraining target evaluation and well pattern deployment .A comprehensive method was adopted to study the reservoirs from macroscopic to microscopic observation ,from qualitative to quantitative analysis and from appearance description to internal heterogeneity evaluation .Several key techniques were proposed , including channel sedimentary sequence identification , forward modeling of stacked channel sands , description of space distribution of facies and quantitative characterization of reservoirs based on progressive inversion .They were successfully used in subdivision of channel sequence ,prediction of stacking pattern and quantitative description of appearance ,making it possible to perform fine evaluation of development target with single channel as an appraisal unit .A technology system was established for fine description and characterization of continental channel sands in tight -gas reservoirs .