Sedimentary Facies Belt And Reservoir Characteristics Of The Ordovician Lianglitage Formation In The Halahatang Area

In this paper,the study area for the northern uplift of tarim basin Halahatang area six even areas(Qiman,Ha 6,Xinken,Rewapu,Qige and Jinyue areas),the research on the horizon for the Ordovician system in Lianglitake Formation.Research area in addition to the Ordovician Yijianfang Formation and Yingshan Formation as the main oil producing,First part of Lianglitake Formation see what a good oil and gas shows,but did not form industrial flows;Third part of Lianglitake Formation has been produced in various Wells industrial flows,is an important oil-producing formation period.This thesis mainly from the angle of the sedimentary facies and reservoir characteristics research,make full use of the research area in drilling,logging,well logging,testing,test results and the method of combining seismic data in the precise observation coring well core characteristic,summarized core analysis test data,single well,and even the well-tie formation,on the basis of analysis of sedimentary facies,the Halahatang area on the Ordovician system in good tager carbonate strata sedimentary facies distribution features of in-depth and meticulous research,In the Ordovician carbonates subtle stratigraphic division,on the basis of further study of the Ordovician in Lianglitake Formation of sedimentary microfacies types,characteristics and sedimentary environment,finally build a Lianglitake Formation in the late Ordovician sedimentary facies types of sedimentary facies evolution pattern,determine Lianglitake Formation evolution in a good way for a platform edge facies-slope and-basin facies sedimentary combination,sedimentary environment for the platform edge marginal depression clip platform margin reef body;Platform margin reef body is larger,the overall thickness distribution is continuous,has good on horizontal comparative;Reef facies of granular limestone can be used as the favorable reservoir distribution zone.In reservoir characteristics research,through to the core of seam hole coring well statistics and description,carbonate reservoir petrology characteristics,reservoir property and imaging logging data and seismic data interpretation,on the basis of the study consider Lianglitake Formation development the main reservoir type in four categories:caves,holes,cracks,fractures and holes,the main reservoir space for caves,holes and cracks.Through to the main control factors of reservoir make a detailed study,points out that Halahatang area on the Ordovician system in Lianglitake Formation carbonate rock karst-superposition of platform margin in karst area is located in the interlayer,solution pores development early,many times karstification and influence each other composite structure effect,space diversity,hydrocarbon occurrence seam hole type reservoir as the important reservoir space.In know reservoir space types and reservoir characteristics,reservoir physical property distribution,pore structure and development characteristics,on the basis of the thought "beaded" seismic reflector is a large seam hole assembly comprehensive response,eventually to Halahatang area in the Ordovician good favorable zones for the development of seam hole reservoir evaluation,for oil and gas exploration and development in the study area provide a solid theoretical foundation and technical support.