叠前地震描述技术在SLG地区储层预测中的应用
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摘要
SLG地区天然气资源量丰富,是我国油气增储上产的重要区域,利用叠后地震描述进行储层预测时多解性很强,本文针对SLG地区盒8段储层,充分利用了叠前地震资料信息丰富的特点,以AVO模型正演技术为基础,研究含气砂岩的地球物理响应特征,利用弹性波阻抗反演和叠前同步反演等技术,开展了叠前储层预测和含气性检测,形成了叠前地震描述技术系列,实际钻探结果表明,预测结果的精度较高,表明利用叠前地震描述技术进行SLG地区盒8段储层预测是可行的。
Natural gas source of the area SLG is abundant.Moreover it is an important area for increasing reserves and yield.Reservoir prediction has strong ambiguity with poststack seismic descriptive technology.In this paper,for the reservoir of the eighth member of Shihezi Formation,prestack seismic data which include abundant information can be taken full advantage.On the base of AVO model forward calculation,geophysical response character of gas sand is studied.We use many technologies such as elastic impedance inversion and P & S instantaneous inversion to make the prestack reservoir prediction and fluid detection.Then a series of prestack seismic descriptive technologies come into being.The practical drilling results reveal that predictive precision is high.In another word,reservoir prediction is feasible with prestack seismic descriptive technology for the reservoir of the eighth member of the Shihezi Formation in SLG.
Natural gas source of the area SLG is abundant.Moreover it is an important area for increasing reserves and yield.Reservoir prediction has strong ambiguity with poststack seismic descriptive technology.In this paper,for the reservoir of the eighth member of Shihezi Formation,prestack seismic data which include abundant information can be taken full advantage.On the base of AVO model forward calculation,geophysical response character of gas sand is studied.We use many technologies such as elastic impedance inversion and P & S instantaneous inversion to make the prestack reservoir prediction and fluid detection.Then a series of prestack seismic descriptive technologies come into being.The practical drilling results reveal that predictive precision is high.In another word,reservoir prediction is feasible with prestack seismic descriptive technology for the reservoir of the eighth member of the Shihezi Formation in SLG.
引文
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[4] 夏红敏,王尚旭,李生杰.含气地层的AVO响应分析[J].石油物探,2006,45(4) :357～361． Xian H M, Wang S X, Li S J. AVO analysis on gas bearing layerCJ]. GPP,2006,45(4) :357～361．
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[7] Castagna J P, Swan H W, Foster D J. Framework for AVO gradient and intercept interpretation [J]. Geophysics, 1998,63:948～956．
[8] Connolly P, Elastic impedance: The Leading Edge, 1999, 18(4) : 438～452．
[9] 苑书金.叠前地震反演技术的进展及其在岩性油气藏勘探中的应用[J].地球物理学展,2007,22(3) ;879～886． Yuan S J. Progress of pre-stack inversion and application in exploration of the lithological reservoirs [J ]. Progress in Geophysics,2009,22(3) :879～886．
[10] 张文,陈文侠,长春岭油田储层预测研究[J].地球物理学进展,2009,24(2) :494～500． Zhang W, Cheng W X. Reservoir prediction research in the Changchunling oil field[J]. Progress in Geophysics, 2009,24(2) :494～500．
[2] 史松群,赵玉华.苏里格气田低阻砂岩储层的含气性预测研究[J].石油地球物理勘探.2003,28(1) :77～83． Shi S Q. Zhao Y H. Research on gas-bearing prediction using AVO in sandstone reservoir with low-impedance in Sulige gas field[J]. Oil Geophysical Prospecting. 2003 ,28( 1) : 77～83．
[3] 黄饶,陈小宏,李景叶.疏松砂岩气藏地震AVO属性敏感性分析与评价[J].地球物理学进展,2009,24(2) :551～557． Huang R, Cheng X H. Li J Y. Sensitivity analysis and evaluation of AVO property in unconsolidated gas santone[J]. Progress in geophysics,2009,24(2) :551～557．
[4] 夏红敏,王尚旭,李生杰.含气地层的AVO响应分析[J].石油物探,2006,45(4) :357～361． Xian H M, Wang S X, Li S J. AVO analysis on gas bearing layerCJ]. GPP,2006,45(4) :357～361．
[5] Carcione J M. Amplitude variations with offset of pressureseal reflections[J]. Geophysics,2001,66(1) :283～293
[6] Carcione J M, Umberta T. Bottom-simulating reflectors:seismic velocities and AVO effects [J]. Geophysics, 2000, 65(1) :54～67
[7] Castagna J P, Swan H W, Foster D J. Framework for AVO gradient and intercept interpretation [J]. Geophysics, 1998,63:948～956．
[8] Connolly P, Elastic impedance: The Leading Edge, 1999, 18(4) : 438～452．
[9] 苑书金.叠前地震反演技术的进展及其在岩性油气藏勘探中的应用[J].地球物理学展,2007,22(3) ;879～886． Yuan S J. Progress of pre-stack inversion and application in exploration of the lithological reservoirs [J ]. Progress in Geophysics,2009,22(3) :879～886．
[10] 张文,陈文侠,长春岭油田储层预测研究[J].地球物理学进展,2009,24(2) :494～500． Zhang W, Cheng W X. Reservoir prediction research in the Changchunling oil field[J]. Progress in Geophysics, 2009,24(2) :494～500．
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