三肇凹陷葡萄花油层高分辨率层序地层划分及沉积特征研究
HighResolutionSequenceStratigraphyDivisionandDepositional CharacteristicsofPutaohuaReservoir,SanzhaoDepression
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摘要: 应用高分辨率层序地层学理论,通过对各级基准面旋回的沉积动力学分析,依据10口井岩心和1256口井测井资料,把松辽盆地三肇凹陷葡萄花油层划分为1个长期基准面旋回、2个中期基准面旋回、12个短期基准面旋回,提出了葡萄花油层南部为同沉积构造抬升控制的中部缺失而非底部缺失的层序地层新格架。通过对短期基准面旋回内储层沉积特征、单砂体展布规律的研究,认为葡萄花油层主要储层水下河道砂体比原认识更连续,且延伸较远,
分流平原、内前缘相带南移达36km,这对深入认识该区油藏类型、聚油规律、特别是高含水期剩余油挖潜具有重要意义,对指导整个松辽盆地北部岩性油气藏勘探与开发具有重大影响。Abstract: Byusingthehighresolutionsequencestratigraphytheory,throughdepositionaldynamicanalysis,thecores
of10wellsand1256wellloggingdata,PutaohuareservoirofSanzhaodepressioninSongliaobasinisdividedas1
longtermbaselevelcycle,2mediumterm baselevelcycles,12shortterm baselevelcycles,proposedmiddleflaw
nonbaseflawsequenceformationnewframeworkwiththesedimentarystructureliftingcontrolinthesouthofPutaohua
reservoir.Throughthestudyofreservoirdepositioncharacterandsinglesandbodydistributionlawinshorttermbase
levelcycle,itisrealizedthatthesubmarineriversandbodyasPutaohuareservoirmainreservoircourseiscontinual
thanoriginalunderstanding,alsoextendsfaraway,thedivergenceplain,innerfrontfaciesbeltsouthmovementreac
hingto36km,thishasimportantsignificancetoknowreservoirtypesinthisarea,isspeciallyhighwaterytimeremai
ningoilextractionpotential,hasthesignificantinfluenceoninstructinglithologicalreservoirexplorationandthedevel
opmentinthenorthblockofSongliaoBasin. -

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