科学技术与工程
科學技術與工程
과학기술여공정
SCIENCE TECHNOLOGY AND ENGINEERING
2015年
22期
7-12
,共6页
李皋%田旭%林小琰%孟英峰%杨旭
李皋%田旭%林小琰%孟英峰%楊旭
리고%전욱%림소염%맹영봉%양욱
气体钻井%地层出水%出水预测%流固耦合
氣體鑽井%地層齣水%齣水預測%流固耦閤
기체찬정%지층출수%출수예측%류고우합
gas drilling%formation water production%quantitative prediction%fluid-structure interac-tion
气体钻井地层出水定量准确预测是气体钻井可行性钻前论证的关键。目前,已有的出水量预测方法较少考虑气体钻井井底压差下地层渗流过程与地层应力变化的流固耦合作用对出水量的影响,在渗流力学和岩石力学的基础上,综合考虑地层渗流过程与岩石应力变化的流耦合作用对地层应力、孔隙度、渗透率以及孔隙压力的影响,建立气体钻井孔隙性地层和孔隙-裂缝性地层出水量预测动态流固耦合模型。结合工程实际,通过该模型计算得到气体钻井快速钻穿水层后出水量随时间的变化关系,计算结果与现场监测吻合。研究对于钻前准确预测出水量和筛选气体钻井层位具有重要意义。
氣體鑽井地層齣水定量準確預測是氣體鑽井可行性鑽前論證的關鍵。目前,已有的齣水量預測方法較少攷慮氣體鑽井井底壓差下地層滲流過程與地層應力變化的流固耦閤作用對齣水量的影響,在滲流力學和巖石力學的基礎上,綜閤攷慮地層滲流過程與巖石應力變化的流耦閤作用對地層應力、孔隙度、滲透率以及孔隙壓力的影響,建立氣體鑽井孔隙性地層和孔隙-裂縫性地層齣水量預測動態流固耦閤模型。結閤工程實際,通過該模型計算得到氣體鑽井快速鑽穿水層後齣水量隨時間的變化關繫,計算結果與現場鑑測吻閤。研究對于鑽前準確預測齣水量和篩選氣體鑽井層位具有重要意義。
기체찬정지층출수정량준학예측시기체찬정가행성찬전론증적관건。목전,이유적출수량예측방법교소고필기체찬정정저압차하지층삼류과정여지층응력변화적류고우합작용대출수량적영향,재삼류역학화암석역학적기출상,종합고필지층삼류과정여암석응력변화적류우합작용대지층응력、공극도、삼투솔이급공극압력적영향,건립기체찬정공극성지층화공극-렬봉성지층출수량예측동태류고우합모형。결합공정실제,통과해모형계산득도기체찬정쾌속찬천수층후출수량수시간적변화관계,계산결과여현장감측문합。연구대우찬전준학예측출수량화사선기체찬정층위구유중요의의。
Gas drilling formation water accurate quantitative prediction is the key to the feasibility of gas drilling decision.At present, the existing water quantitative prediction methods did not take the influence of the fluid-struc-ture coupling effect into consideration while water output under the pressure differential between the bottom hole and the formation.On the basis of seepage mechanics and rock mechanics, taking the influence of the fluid-structure coupling effect to formation stress, porosity, permeability and pore pressure into consideration, the dynamic fluid-structure interaction water quantitative prediction model for matrix formation and matrix-fracture formation in gas drilling was established.Combining with the engineering practice, with this model, the water quantitative produc-tion over time after penetrating the water formation was calculated, the calculation results coincide with the field monitoring.This Research has great significance to accurately prediction of water production and filtering of gas drilling feasible area before gas drilling.