草104块边底水稠油油藏开发对策研究

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1、中图分类号：TE345单位代码：11414学号：2013212141题目草104块边底水稠油油藏开发对策研究学科专业油气田开发工程研究方向油气渗流理论与应用硕士生曹崇指导教师宁正福（教授）王庆（讲师）二○一六年五月摘要摘要本文以草104块边底水稠油油藏主力含油层ES2和ES3为研究对象，针对草104块油藏出现的注汽井筒热利用率低、生产井含水率高和产油量低等问题进行了研究，并提出了开发对策。针对注汽井筒热利用率低的问题，建立了井筒传热综合分析模型并且将模型计算结果与现场测试结果对比验证了模型的正确性，然后对井筒内各注汽参数敏感性进行

2、分析，提出了适合该区块的最优注汽参数。针对该区块边底水侵的问题，在该区块典型模型的基础上对影响稠油油藏水侵特点的因素进行了研究，最后提出某些井高含水层位进行机械堵孔、化学剂选择性堵孔以及开发方式由蒸汽吞吐转为蒸汽驱的解决方法。接着在区块典型模型基础上对比吞吐到底和吞吐后转驱两种开发方式，进行开发方式的优选。最后把提高井筒热利用率和控制边底水措施应用在全区数值模拟过程后，对比了四种不同转驱时间下油藏开发二十年后的采收率，得出结论是2018年转蒸汽驱效果最优，二十年后采收率约为14.95%。关键词：边底水；稠油油藏；热利用率；开发策略

3、-II-ABSTRACTStudyofDevelopmentCountermeasuresinCao104HeavyOilReservoirwithEdge-bottomWaterABSTRACTMainoillayersES2andES3ofCao104heavyoilreservoirwithedge-bottomwateraretakenastheresearchobject.Thatheatutilizationrateofinjectionwellboredecrease,watercutofproductionwell

4、sincreasesharplyandoilproductiondecreaseareexistingproblemsintheoilfield.Thearticledoesresearchontheseproblemsandseveraldevelopmentcountermeasuresareputforward.Fortheproblemoflowwellboreheatutilizationrateofsteaminjection,comprehensiveanalysisofwellboreheattransfermod

5、elisestablishedandthemodelcalculationresultsarecomparedwiththetestresultsinoilfiledtoverifythevalidityofthemodel.Thenarticleanalysesparameterssensitivityofsteaminjection,andputforwardtheoptimalsteaminjectionparameterstothisoilfiled.ForEdge-bottomwaterinvasionproblem,b

6、asedonthetypicalmodeloftheoilfiled,effectfactorsofwaterinvasiontoheavyoilreservoirisresearched,andputforwardsomesolutionssuchasmechanicalblockingmethodandselectiveblockingmethodwithchemicalblockingagentandchangingdevelopmentmodefromsteamhuffandpufftosteamdriving.Thena

7、rticlebasedonthetypicalmodel,comparesteamhuffandpuffwithsteamflooding,anddooptimalselection.Finally,toimprovethewellboreheatutilizationrateandcontroledge-bottomwater,measuresareappliedinthenumericalsimulationprocess.Comparerecoveryafter20yearsoffourdifferentplanswithd

8、ifferenttimetoturntosteamflooding,andtheconclusionisthatoptimaltimetoturntosteamfloodingisin2018,and20yearslaterrecoveryisab