Research on connectivity evaluation methods and application for dolomite reservoir with fracture-cave
Received date: 2016-06-03
Revised date: 2016-09-07
Online published: 2017-08-10
Natural gas was found mainly stored in corroded pores and caves in the Lower Cambrian Longwangmiao Formation dolomite gas reservoirs in the Moxi block of Sichuan Basin.Because of the diversity of combination of pores and holes and fractures,different reservoir physical property and different gas well deliverability are found in different position of the grain beach with strong heterogeneity.So,it is difficult for the connectivity evaluation on this.Based on the reservoir characteristics,the combination of dynamic and static analysis method of gas well connectivity was built.Firstly,based on static data,comparative analysis methods of geological characteristics,formation pressure,and fluid property are used to evaluate gas reservoir (well) connectivity.Secondly,based on dynamic data,comparative analysis methods are used to evaluate gas reservoir (well) connectivity,which include pressure build-up test,pseudo-interference well test,and production performance analysis.Finally,based on pseudo-steady seepage theory,i.e.gas rate is proportional to the dynamic reserve controlled by the well.Gas well connectivity was comprehensively evaluated by the combination of dynamic and static analysis method.In a case study from the well block of Moxi 9,gas reservoir (well) connectivity is good in the main body of grain beach.For example,the fluid property is similar for all wells,and the formational pressures synchronously decline between new wells and old wells.No boundary features are found in Log well test curves,and inter-well interference phenomenon is found in the curve of normalized rate and metrical balance pseudo time,and gas rate is proportional to the dynamic reserve controlled by the well.When Well Moxi 009-X6 was put into production,its formation pressure was higher than that of Well Moxi 009-X1 at the same time,which is 1.5 kilometers away from Well Moxi 009-X6.Further,it is not connected to all but a certain direction.
Su Yun-he，Li Xi-zhe，Wan Yu-jin，Zhang Lin，Liu Xiao-hua，Liu Hua-lin . Research on connectivity evaluation methods and application for dolomite reservoir with fracture-cave[J]. Natural Gas Geoscience, 2017 , 28(8) : 1219 -1225 . DOI: 10.11764/j.issn.1672-1926.2016.11.005
[1]Feng Guoqing,Zhang Liehui,Li Yun.Simulation of reservoir spatial connectivity[J].Natural Gas Industry,2004,24(11):97-99.[冯国庆,张烈辉,李允.储层空间连通性模拟[J].天然气工业,2004,24(11):97-99.]
[2]Yi Bin,Cui Wenbin,Lu Xinbian,et al.Analysis of dynamic connectivity on carbonate reservoir with fracture and cave in Tahe Oilfield ,Tarim Basin[J].Xinjiang Petroleum Geology,2011,32(5):469-472.[易斌,崔文彬,鲁新便,等.塔河油田碳酸盐岩缝洞型储集体动态连通性分析[J].新疆石油地质,2011,32(5):469-472.]
[3]Lu Linlin,Yang Zuoming,Sun Hedong,et al.Analysis of gas well connectivity based on dynamic and static data: A case study from the volcanic gas reservoirs in the Kelameili Gasfield[J].Natural Gas Industry,2012,32(12):58-61.[路琳琳,杨作明,孙贺东,等.动静态资料相结合的气井连通性分析——以克拉美丽气田火山岩气藏为例[J].天然气工业,2012,32(12):58-61.]
[4]Deng Hui,Feng Xi,Wang Hao,et al.A method for early-stage dynamic reserves calculation and its applicability in complex gas reservoirs[J].Natural Gas Industry,2012,32(1):61-63.[邓惠,冯曦,王浩,等.复杂气藏开发早期计算动态储量方法及其适用性分析[J].天然气工业,2012,32(1):61-63.]
[5]Li Xizhe,Wan Yujin,Lu Jialiang,et al.The Development Technology in Complex Gas Reservoirs[M].Beijing: Petroleum Industry Press,2010:37-183.[李熙喆,万玉金,陆家亮,等.复杂气藏开发技术[M].北京:石油工业出版社,2010:37-183.]
[6]Li Huijun,Zhou Xingui,Zhang Linyan,et al.Carbonate reservoir comparison between Tahe Oilfield and Puguang Gasfield[J].Acta Geologica Sinica,2009,15(4):396-405.[李会军,周新桂,张林炎,等.塔河油田、普光气田碳酸盐岩储层特征对比研究[J].地质学报,2009,15(4):396-405.]
[7]Chen Wangang.Study of Connectivity and Water Control Strategy in the Early Development of Carbonate Gas Reservoir:Sichuan LG Gasfield for Example[D].Chengdu:Chengdu University of Technology,2011:55-78.[陈万钢.碳酸盐岩气藏开发早期连通性及治水对策研究__以四川LG气田为例[D].成都:成都理工大学,2011:55-78.]
[8]Su Yunhe,Tang Yong,Xiao Yun,et al.Impacts of CO2 content on the development indexes of volcanic gas reservoirs[J].Natural Gas Industry,2011,31(8):69-72.[苏云河,汤勇,肖云,等.CO2含量对火山岩气藏开发指标的影响[J].天然气工业,2011,31(8):69-72.]
[9]Zhuang Huinong.Dynamic Well Testing in Petroleum Exploration and Development[M].Beijing: Petroleum Industry Press,2009:106-279.[庄惠农.气藏动态描述和试井[M].北京:石油工业出版社,2009:106-279.]
[10]Wang Shunyu,Ming Qiao,Huang Ling,et al.Study on Geochemical characteristics of Fliuids and Reservoir continuity of Xujiahe Formation in Qiongxi Gasfield,Sichuan Basin[J].Natural Gas Geoscience,2007,18(6):789-792.[王顺玉,明巧,黄羚,等.邛西地区邛西构造须二段气藏流体地球化学特征及连通性研究[J].天然气地球科学,2007,18(6):789-792.]
[11][JP3]Wang Shunyu,Ming Shuang,Liang Cong,et al.Geochemical characteristics of natural gas and reservoir continuity of the second member of Xujiahe Formation in the Pingluoba Structure,Sichuan Basin[J].Natural Gas Geoscience,2014,25(3):388-393.[王顺玉,明爽,梁聪,等.平落坝构造须二段天然气地球化学特征及井间连通性判识[J].天然气地球科学,2014,25(3):388-393.]
[12]Olivier Houzé,Didier Viturat,Ole S F,et al.Dynamic Data Analysis[M].France:Kappa,2014:285-342.
[13]IHS Harmony,RTA technical document-theory and equations[EB/OL].http://www.fekete.com.
/
| 〈 |
|
〉 |
甘公网安备 62010202000678号