苏里格气田气井最低经济可采储量评价图版  

Evaluation chart of minimum economic recoverable reserves of gas Wells in Sulige Gas Field

作　　者：尹涛[1] 李志超[2] 王俊[1] 张波[2] 但霞 Yin Tao;Li Zhichao;Wang Jun;Zhang Bo;Dan Xia(Natural Gas Economic Research Institute,PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan 610051,China;Exploration and Development Research Institute,PetroChina Changqing Oilfield Company,Xi'an,Shaanxi 710018,China;Sichuan Changning Gas Development Co.Ltd.,PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan 610056,China)

机构地区：[1]中国石油西南油气田公司天然气经济研究所,四川成都610051 [2]中国石油长庆油田分公司勘探开发研究院,陕西西安710018 [3]四川长宁天然气开发有限责任公司,四川成都610056

出　　处：《天然气技术与经济》2020年第4期50-55,共6页Natural Gas Technology and Economy

基　　金：国家科技重大专项“鄂尔多斯盆地大型低渗透岩性地层油气藏开发示范工程”(编号:2016ZX05050);中国石油天然气股份有限公司重大科技专项“长庆气田稳产及提高采收率技术研究”(编号:2016E-0509)。

摘　　要：鄂尔多斯盆地苏里格气田是典型的致密砂岩气藏,储层非均质性极强,单井产量低,低产井比例已超过生产井数的60%,为了弄清气井开发效益现状和效益开发的界限,基于气井生产指标和实际财务数据,评价了不同井型的最低经济可采储量。通过静态法评价了单井经济极限产量,动态法评价单井内部收益率达到6.0%时预测对应气井年产气量,求取了不同井型的最低经济可采储量,回归建立了销售气价与最低经济可采储量关系图版。研究结果表明:①单井经济极限产量为静态瞬时值,随生产经营成本、销售气价以及开井时率的变化而变化;②若直井建井投资800万元/口、水平井2 400万元/口,反算达到内部基准收益率6.0%时,对应最低经济可采储量分别为1520×10^4m^3、4 450×10^4m^3;③所建立的销售气价与最低经济可采储量图版,可以指导气井效益预测和气田效益建产,若致密气补贴能达到0.2~0.3元/m^3,预测气田中23.6%~31.2%的Ⅲ类井将转为效益开发。In Sulige gasfield,Ordos Basin,there are typical tight sandstone gas reservoirs featured by extremely heteroge⁃neous,low single-well production rate,and strippers in producers over 60%.In order to clarify the development benefit status of gas wells and define the limit of efficient development,the lower limit of economic recoverable reserves was evaluated for different well types based on production index and true financial data.Then,the single-well production rate of economic limit and the single-well internal rate of return were individually assessed by means of static and dynamic methods.When the internal rate of return reached 6.0%,the corresponding yearly gas production was predicted.Finally,the lower limit of economic recoverable reserves was calculated,and one relationship chart of gas sales price and lower limit was established regressively.Results show that(1)the single-well production rate of economic limit is a static instantaneous value,and it varies with production and operation cost,gas sales price,and well opening rate;(2)if the con⁃struction investment of vertical wells is 8×10^6 yuan/well and that of horizontal wells is 24×10^6 yuan/well,the lower limit of economic recoverable reserves corresponding to the internal rate of return of 6.0%is 1520×10^4 m^3 and 4450×10^4 m^3,respectively;and(3)the established chart can provide guidance for the well benefit prediction and the field cost-effective conductivity construction.It is predicted that 23.6%-31.2%of III-type wells in Sulige gasfield will convert into efficient development if the allowance of tight gas is up to 0.2-0.3 yuan/m^3.

关 键 词：鄂尔多斯盆地 苏里格气田 建井投资 生产成本 收益率 经济极限 可采储量 

分 类 号：TE328[石油与天然气工程—油气田开发工程]