Effects of faults geomechanical activity on water invasion in Kela 2 Gasfield,Tarim Basin

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  • PetroChina Tarim Oilfield Company,Korla 841000,China

Received date: 2017-06-21

  Revised date: 2017-09-07

  Online published: 2017-11-10

Abstract

After more than ten years high-speed development,the most productive continental gasfield in China,Kela 2 Gasfield is now facing challenges associated with water breakthrough in gas well and heterogeneous water invasion in the field.To further understand the water invasion mechanism of the high pressure gasfield under complex tectonic setting,an investigation of faults geomechanical activity was conducted to investigate the relationship between variation of faults mechanical activity and water breakthrough of gas well.The faults geomechanical activity prediction model was established based on the combination of modeling of four dimensional stress field and 3D faults mechanical analysis to research its effects on water invasion in this field.The results are shown:(1)There is a good correlation between water breakthrough in gas well and faults mechanical characteristics.With the development of gas reservoir,dynamic variation of stress field led to change of stress state on faults’ planes,so that the permeability of the faults zone would be able to become stronger or weaker.(2)With the depletion of gas reservoir,the gas wells near the faults with higher geomechanical activity would produce water earlier and the gas-water interface would rise faster.(3)Because the distribution of stress field and faults in the reservoir are complex,there are great differences in the faults mechanical activity on different location of structure,which result in the uplift of gas-water interface being greatly different and inhomogeneous in the reservoir.The research further clarified the mechanism of water invasion in Kela 2 Gasfield,the gas reservoir is divided into three water breakthrough risk districts based on the prediction of faults geomechanical activity to do early warning for the areas and gas wells which has the high risk of water invasion.This research provides a basis for optimizing the development program of Kela 2 Gasfield.
 

Cite this article

Jiang Tong-wen,Zhang Hui,Wang Hai-ying,Yin Guo-qing,Xiao Xiang-jiao . Effects of faults geomechanical activity on water invasion in Kela 2 Gasfield,Tarim Basin[J]. Natural Gas Geoscience, 2017 , 28(11) : 1735 -1744 . DOI: 10.11764/j.issn.1672-1926.2017.09.003

References

[1]Fisher Q J,Knipe R J.The permeability of faults within siliciclastic petroleum reservoirs of the North Sea and Norwegian continental shelf[J].Marine and Petroleum Geology,200,18(10):1063-1081.
[2]Sample J C,Reid M R,Tobin H J,et al.Carbonate cements indicate channeled fluid flow along a zone of vertical faults at the deformation front of the Cascadia accretionary wedge (northwest U.S.coast)[J].Geology,199,21(6):507-510.
[3]Bouvier J D,Kaars-Sijpesteijn C H,Kluesner.Three-dimensional seismic interpretation and fault sealing investigations,Nun river field,Nigeria[J].AAPG Bulletin,1989,73(1):1397-1414.
[4]Faulkner D R,Jackson C A L,Lunn R J.A review of recent developments concerning the structure,mechanics and fluid flow properties of fault zones[J].Journal of Structural Geology,2010,32(11):1557-1575.
[5]Barton C A,Zoback M D,Moos D.Fluid flow along potentially active faults in crystalline rock[J].Geology,1995,23(4):683-686.
[6]Paul P,Zoback M D,Hennings P.Fluid flow in a fractured reservoir using a geomechanically constrained fault zone damage model for reservoir simulation[J].SPE:Reservoir Evaluation and Engineering,2007,12(4):562-575.
[7]Zoback M D.Reservoir Geomechanics[M].Cambridge:Cambridge University Press,2007.
[8]Townend J,Zoback M D.How faulting keeps the crust strong[J].Geology,2000,28(5):399-402.
[9]Tamagawa T,Pollard D D.Fracture permeability created by perturbed stress fields around active faults in a fractured basement reservoir[J].AAPG Bulletin,2008,92(4):743-764.
[10]Hennings P,Allwardt P,Paul P.Relationship between fractures,fault zones,stress,and reservoir productivity in the Suban Gasfield,Sumatra,Indonesia[J].AAPG Bulletin,201,96(4):753-772.
[11]Gu Jiayu,Fang Hui,Jia Jinhua.Diagenesis and reservoir characteristics of cretaceous braided delta sandbody in Kuqa Depression,Tarim Basin[J].Acta Sedimentologica Sinica,200,19(4):517-523.
[12]Jiang Tongwen,Tang Minglong,Wang Hongfeng.Fine 3D geologic modeling of reservoirs under control of wide spacing in the Kela-2 Gasfield[J].Natural Gas Industry,2008,28(10):11-14.[江同文,唐明龙,王洪峰.克拉2气田稀井网储层精细三维地质建模[J].天然气工业,2008,28(10):11-14.]
[13]Jia Chengzao,Zhou Xinyuan,Wang Zhaoming,et al.The geology characteristics of Kela-2 Gasfield[J].Chinese Science Bulletin,200,47(S1):91-96.[贾承造,周新源,王招明,等.克拉2气田石油地质特征[J].科学通报,200,47(S1):91-96.]
[14]Zhong Dakang,Zhu Xiaomin.Reservoirs characteristics and formation mechanism of high quality reservoirs in Kela-2 Gas field[J].Natural Gas Industry,2007,27(1):8-11.[钟大康,朱筱敏.克拉2气田储层特征及优质储层形成机理[J].天然气工业,2007,27(1):8-11.]
[15]He Dengfa,Zhou Xinyuan,Yang Haijun,et al.Geological structure and its controls on giant oil and gas fields in Kuqa Depression,Tarim Basin:A clue from new shot seismic data[J].Geotectonica et Metallogenia,2009,33(1):19-32.[何登发,周新源,杨海军 等.库车坳陷的地质结构及其对大油气田的控制作用[J].大地构造与成矿学,2009,33(1):19-32.]
[16]Wang Zhaoming.Formation mechanism and enrichment regularities of Kelasu subsalt deep large gas field in Kuqa Depression,Tarim Basin[J].Natural Gas Geoscience,2014,25(2):153-166.[王招明.塔里木盆地库车坳陷克拉苏盐下深层大气田形成机制与富集规律[J].天然气地球科学,2014,25(2):153-166.]
[17]Hoyland A L,Papatzacos P,Skjveland M S.Critical rate for water coning:Correlation and analytical solution[J].Society of Petroleum Engineers Paper,1989(11):495-499.
[18]Song Zhaojie,Li Xiangfang,Li Zhiping,et al.A model for calculating critical production rates of water coning with consideration of non-Darcy flow[J].Acta Petrolei Sinica,201,33(1):106-110.[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,201,33(1):106-110.]
[19]Van Golf-Racht T D.Water Coning in a Fractured Reservoir[C].New Orleans,Louisiana:SPE Annual Technical Conference and Exhibition,1994.
[20]Sun Zhidao.Production characteristics and the optimization of development schemes of fractured gas reservoir with edge or bottom water[J].Petroleum Exploration and Development,200,29(4):69-71.[孙志道.裂缝性有水气藏开采特征和开发方式优选[J].石油勘探与开发,200,29(4):69-71.]
[21]Shen Weijun,Li Xizhe,Liu Xiaohua,et al.Physical simulation of water influx mechanism in fractured gas reservoirs[J].Journal of Central South University:Science and Technology,2014,45(9):3283-3284.[沈伟军,李熙喆,刘晓华 等.裂缝性气藏水侵机理物理模拟[J].中南大学学报:自然科学版,2014,45(9):3283-3284.]
[22]Jaeger J C,Cook N G W.Fundamentals of Rock Mechanics[M].First Edition.London:Chapman and Hall,1979.
[23]Zoback M D,Barton C A,Brudy M,et al.Determination of stress orientation and magnitude in deep wells[J].International Journal of Rock Mechanics and Mining Sciences,200,40(7/8):1049-1076.
[24]Prats M.Effect of burial history on the subsurface horizontal stresses of formation having different material properties[J].Society of Petroleum Engineers Journal,198,21(6):658-662.
[25]Tong Hengmao.Quantitative analysis of fault opening and sealing[J].Oil & Gas Geology,1998,19(3):215-220.[童亨茂.断层开启与封闭的定量分析[J].石油与天然气地质,1998,19(3):215-220.]
[26]Kranz R L,Frankel A D,Engelder T,et al.The permeability of whole and jointed Barre granite[J].International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts Pergamon,1979,16(4):225-234.

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