第34卷第3期2012年5月石油钻采工艺OILDRILLING&PRODUCTIONTECHNOLOGYVol.34No.3May2012文章编号：1000–7393（2012）03–0067–06一种考虑长期导流的人工裂缝参数优化方法杨立峰1，2安琪3丁云宏1，2崔明月1，2许志赫1，2（1.中石油勘探开发研究院廊坊分院，河北廊坊065007；2.中国石油天然气集团公司油气藏改造重点实验室，河北廊坊065007；3.中国石油新疆油田分公司风城油田作业区，新疆克拉玛依834000）引用格式：杨立峰，安琪，丁云宏，等.一种考虑长期导流的人工裂缝参数优化方法［J］.石油钻采工艺，2012，34（3）：67-72.摘要：无因次支撑指数法在人工裂缝参数优化时未考虑裂缝导流能力随时间变化对压裂井产能的影响，因此优化结果在实际生产时并非最优。结合支撑剂的长期导流实验结果，将无因次支撑指数法中的裂缝宽度和渗透率转换为时间变量的函数，并对无因次支撑指数法进行时间积分，求取最大的无因次累计生产指数，作为最优的裂缝参数优化结果。由于该方法引入了时间变量，考虑了支撑剂导流能力随时间的变化，因此较无因次支撑指数法更符合实际。研究结果表明，针对低渗、特低渗储层，在考虑长期导流能力的情况下，优化结果所需缝宽更大，支撑剂铺置浓度更高，改变了以往低渗、特低渗储层对人工裂缝导流能力要求不高、尽量造长缝的观点，对提高单井压后增产有效期和压后效果有重要意义。建议对特定区块开展有针对性的铺置浓度对支撑剂长期导流能力的影响规律研究，为无因次累计生产指数法的应用提供可靠的基础数据。关键词：压裂；低渗透；特低渗透；无因次支撑指数；无因次生产指数；无因次累计生产指数中图分类号：TE357.1文献标识码：AAnewoptimalmethodonartificialfractureparameterwithlong-termconductivitytakenintoaccountYANGLifeng1,2,ANQi3,DINGYunhong1,2,CUIMingyue1,2,XUZhihe1,2（1.LangfangBranchofResearchInstituteofPetroleumExploration&Development,Langfang065007,China;2.ChinaNationalPetroleumCorporationtheKeyLaboratoryofReservoirStimulation,Langfang065007;3.FengchengOilfieldarea,PetroChinaXinjiangOilfieldCompany,Karamay,Xinjiang834000,China）Abstract:Artificialfractureparameteroptimizationwithdimensionlessproppantindexmethodisananalyticalapproachwidelyused,buttheeffectoflong-termartificialfractureconductivityperformancechangewithtimeonthewellproductivityhavenotbeentakenintoaccount.Theoptimizationresultsbydimensionlessproppantindexmethodarenotthebestoneintheviewofpracticalproductionofstimulationwells.Inthispaper,combinedwiththeexperimentalresultsoflong-termproppantconductivity,transferringthefracturewidthandpermeabilityindimension-lessproppantindexmethodintothefunctionsoftime,thedimensionlesscumulativeproductivityindexhasbeenpresentedthoughtheintegralofdimensionlessproppantindexwithrespecttotime.Andthisresultwillserveastheoptimalfractureparameter.Becauseofvariabletimebeingintroducedintotheformulaandconsideringthechangeofproppantconductivityperformancewithtime,thecalculatingmethodismoresuitableinpracticeandmorereasonablecomparingtodimensionlessproppantindexmethod.Thenumericalsolutionsshowthatgreaterfracturewidthandhigherconcentrationofproppantshouldbereachedforlowandextra-lowpermeabilityreservoirswithlong-termconductivitytakenintoaccountinordertogetmorecumulativeproduction.Theviewsoflowerdemandartificialfractureconductivityandlongerfractureforlowandextra-lowpermeabilityreservoirsshouldbechanged.Thismethodcanprolongthevalidityperiodofpost-treatmentproductionincreaseforsinglewellandisofsignificancetoevaluateoperationeffect.Itissuggestedthattheinfluenceofproppantconcentrationonlong-termconductivityshouldbedevel-opedpertinentlyforcertainareas,whichcouldprovidesreliablereferenceforthe...
