The Technical And Economic Evaluaiton Study On Low Permeability Reservoir Exploitation Process

Rcccnt years due to growing oil quantity demanded, low permeable oil depositexploration and development technologies have experienced mushroom growth. However, inthe meantime, since geological conditions of low permeable oil deposit are relativelycomplicated, a large majoirty of such oil deposit is of low recovery ratio. Therefore, toresearch effective measures to develop such oil deposits and further improve developmenteiffciency of the developed oil deposits have an important realistic signiifcance for thesustained, rapid and sound development of oil industry in our country.In the thesis, based on technological economics theory, technical and economicalevaluation model of waterlfooding program of Laozhuang district in Jingbian oil productionplant in Yanchang oil ifeld is proposed atfer collecting data and having a detailedunderstanding of current situations of technical and economical evaluation of low permeableoil deposit reserves. In addition, comprehensive evaluations on development ciffcicncy arecarired out to oil ifeld in Laozhuang district through reserve estimate, and dynamic analysisand evaluations of oil deposit development efficiency are conducted on basis of lfuidproducing intensity, oil producing rate and identifying productivity of single well. In thesccond place, based on dynamic analysis and evaluations of oil deposit development efifciency,watefrlood recovery eiffciency factor is demarcated through three different methods, atferresearching technological and economical policies of low permeable oil deposit explorationand development project and carrying out feasibility analysis of waterlfooding extractionproject. Then research well spacing density on technique and economic rationality respectively,so as to identify reasonable injection-production ratio, water injection intensity and waterinjection rate.Finally, cany out economic evaluations on recovery process of low permeable oil depositreserves according to oil field development principles and policies, and synthetically analyzeproject feasibility, proiftability and investment risks through relevant financial index toprovide reliable evidence for oil development investors to make decisions. The economicalevaluation results show that such oil deposit development project is of preferable benefit, withlow financial irsks and ordinary opeartional irsks, Ilierefore such project is economicallyfeasible, outputting with favorable economic benefit.