基于管窜影响的碳酸盐岩油藏产水特征图版——以伊拉克Ahdeb油田Rumaila复杂多层碳酸盐岩油藏为例
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摘要
为快速有效地解决伊拉克Ahdeb油田Rumaila复杂多层碳酸盐岩油藏因套管外窜流、高渗通道水窜及分层合采等因素造成的出水类型复杂、水侵机理不明等问题,建立了能表征纯水层、油水过渡带和纯油层精细分布的Rumaila复杂多层碳酸盐岩地质油藏模型。在此基础上,采用实际典型产水曲线标定数模曲线、无因次时间替代实际时间的方式得到不同套管外窜流情况下(水泥环与储层间的第二界面破损位置位于纯水层、油水过渡带和纯油层)的套管外窜流&底水锥进、底水锥进&后期套管外窜流、套管外窜流和射孔段部分位于油水过渡带&套管外窜流等十二种典型产水特征图版,以此对油藏出水类型和水侵机理进行判明与分析。结果表明,产水特征图版能够高效辨析油藏出水类型和水侵机理,有效降低了井下PLT、SWFL测试等工作频率,也为直井后续治水措施的制定提供了可靠依据。
In order to guarantee the fast and professional solution about types of water production and mechanism of water invasionin the Rumaila complex multilayer carbonate reservoir of Ahdeb oilfield with casing channeling, high permeability zone and situa-tion of commingled production, a fine reservoir model which can characterize the pure aquifer zone, oil-water transition zone andpure oil zone was built. On this basis, combined with analysis of water invasion velocity in each reservoir, the various simulationcurves would be calibrated by the actual typical production curves to obtain the different typical water control diagnostic plots in-cluding casing channeling with bottom aquifer coning, bottom aquifer coning with later casing channeling, single casing channelingand the section of perforation located in the oil-water transition zone with later casing channeling(including different position ofcasing channeling: pure aquifer zone, oil-water transition zone and pure oil zone)with dimensionless time, which would be used todistinguish and analyze the reservoir water-producing type and rules. The results showed that the water control diagnostic plotscould accurately obtain the water production type and rules, decrease the downhole PLT, SWFL and other tests, and provide reli-able basis for the stabilizing oil and controlling water of vertical wells.
In order to guarantee the fast and professional solution about types of water production and mechanism of water invasionin the Rumaila complex multilayer carbonate reservoir of Ahdeb oilfield with casing channeling, high permeability zone and situa-tion of commingled production, a fine reservoir model which can characterize the pure aquifer zone, oil-water transition zone andpure oil zone was built. On this basis, combined with analysis of water invasion velocity in each reservoir, the various simulationcurves would be calibrated by the actual typical production curves to obtain the different typical water control diagnostic plots in-cluding casing channeling with bottom aquifer coning, bottom aquifer coning with later casing channeling, single casing channelingand the section of perforation located in the oil-water transition zone with later casing channeling(including different position ofcasing channeling: pure aquifer zone, oil-water transition zone and pure oil zone)with dimensionless time, which would be used todistinguish and analyze the reservoir water-producing type and rules. The results showed that the water control diagnostic plotscould accurately obtain the water production type and rules, decrease the downhole PLT, SWFL and other tests, and provide reli-able basis for the stabilizing oil and controlling water of vertical wells.
引文
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[2]宋兆杰,李相方,李治平,等.考虑非达西渗流的底水锥进临界产量计算模型[J].石油学报,2012,33(1):106-111.
[3]Chan K S.Water control diagnostic plots[C]//paper SPE-30775-MS presented at the SPE Annual Technical Conference and Exhibition,22-25 October 1995,Dallas,Texas,USA.
[4]Yortsos Y C,Choi Y M,Yang Z M,et al.Analysis and interpretation of water/oil ratio in waterfloods[J].Journal of Petroleum Science and Engineering,1999,4(4):413-424.
[5]Yortsos Y C,Choi Y M,Yang Z M,et al.Analysis and interpretation of the water-oil ratio In Waterfloods[C]//paper SPE-38869-MS presented at the SPE Annual Technical Conference and Exhibition,5-8 October 1997,San Antonio,Texas,USA.
[6]Yang Z M.A method for pattern recognition of WOR plots in waterflood management[C]//paper SPE-93870-MS presented a the SPE Western Regional Meeting,30 March-1 April 2005,Irvine,California,USA.
[7]Majid A A,Saif R A,Rashid A,et al.Diagnosis of excessive water production in horizontal wells using WOR plots[C]//paper IPTC-11958-MS presented at the International Petroleum Technology Conference,3-5 December 2008,Kuala Lumpur,Malaysia.
[8]Al-Ghanim J A,Al-Nufaili S A.Middle east field water production mechanisms[C]//paper SPE-127934-MS presented at the SPE Oil and Gas India Conference and Exhibition,20-22 January 2010,Mumbai,India.
[9]Delamaide E.Investigation and observations on the stability of water-oil ratio WOR during chemical floods in heavy oil reservoirs[C]//paper SPE-190471-MS presented at the SPE EORConference at Oil and Gas West Asia,26-28 March 2018,Muscat,Oman.
[10]Yan J N,Plancher H,Morrow N R.Wettability changes induced by adsorption of asphaltenes[J].SPE Production&Facilities,1997,12(4):259-266.
[11]Turner A K.Challenges and Trends for Geological Modeling and Visualization[J].Bullentin of Engineering Geology and the Environment,2006,65(2):109-127.
[12]Al-Ameri T K,Al-Mimar H S,Zumberge J.Petroleum system modeling and risk assessments of Ad'daimah oil field:a case study from Mesan Governorate,south Iraq[J].Arabian Journal of Geosciences,2015,8(8):5739-5766.
[13]Soleimani M,Shokri B J.3D static reservoir modeling by geostatistical techniques used for reservoir characterization and data integration[J].Environmental Earth Sciences,2015,74(2):1403-1414.
[14]潘东亮.天然裂缝性油藏等效介质法数值模拟研究[D].青岛:中国石油大学(华东),2007.
[15]Jin L,Wojtanowicz A K.Coning control and recovery improvement using in-situ water drainage/injection in bottom/water/drive reservoir[C]//paper SPE-129663-MS presented at the SPE Improved Oil Recovery Symposium,24-28 April 2010,Tulsa,Oklahoma,USA.
[16]Delamaide E,Moreno W P.Enhanced oil recovery of heavy oil in reservoirs with bottom aquifer[C]//paper SPE-174050-MSpresented at the SPE Western Regional Meeting,27-30 April2015,Garden Grove,California,USA.
[17]Jurus W J,Stanko M,Parra A,et al.Simplified near wellbore reservoir simulation to predict the performance of viscous oil horizontal well with water coning from an active aquifer[C]//paper SPE-177146-MS presented at the SPE Latin American and Caribbean Petroleum Engineering Conference,18-20 November 2015,Quito,Ecuador.
[18]Perez E M,De La Garza F R,Samaniego-Verduzco F.Water coning in naturally fractured carbonate heavy oil reservoir-a simulation study[C]//paper SPE-152545-MS presented at the SPE Latin American and Caribbean Petroleum Engineering Conference,16-18 April 2012,Mexico City,Mexico.
[19]Permadi P,Jayadi T.An improved water coning calculation for horizontal wells[C]//paper SPE-133162-MS presented at the SPE Russian Oil and Gas Conference and Exhibition,26-28October 2010,Moscow,Russia.