什股壕地区下石盒子组致密砂岩储层特征及展布规律研究.docx

什股壕地区下石盒子组致密砂岩储层特征及展布规律研究
摘要：
针对什股壕地区下石盒子组致密砂岩储层特征及展布规律进行研究。通过对区域地质、岩石物性、薄片观察、CT扫描、孔隙度、渗透性等方面的综合分析和研究，得出了该砂岩储层中的物化特征和展布规律。
首先，通过样品研究，发现下石盒子组砂岩储层具有低孔隙度、低渗透性和高压裂敏感性的特点。主要由亲水性石英、长石和亲油性的石英麻岩构成，孔隙结构主要为微裂、裂缝和溶洞等，储层分为致密砂石灰岩和致密砂岩两种类型。
其次，在展布规律方面，下石盒子组砂岩储层呈现出长短轴比值小、波形振荡明显、层间压力差异大和成熟度差异较大等几个特点。根据地质情况和孔隙度分析，该储层在斜坡和隆起带的展布主要受浅成因断裂控制，并且呈现出高孔、相对低压的模式。而在沉积盆地低洼区域，储层则比较稳定。
最后，针对该储层的特点和规律，建议采取细化预测和精细井网设计等手段，加强储层的高效开发。
关键词：砂岩储层、致密、孔隙度、渗透性、展布规律
Abstract:
ThispaperfocusesonthecharacteristicsanddistributionpatternsoftightsandstonereservoirsintheLowerShiheziFormationintheSheguhaoarea.Throughcomprehensiveanalysisandresearchonregionalgeology,rockphysicalproperties,thinsectionobservation,CTscanning,porosity,permeability,etc.,thephysicochemicalcharacteristicsanddistributionpatternsofthissandstonereservoirwereobtained.
Firstly,throughsampleresearch,itwasfoundthattheLowerShiheziformationsandstonereservoirhasthecharacteristicsoflowporosity,lowpermeability,andhighfracturesensitivity.Itismainlycomposedofhydrophilicquartz,feldspar,andoleophilicquartzite,anditsporestructureismainlycomposedofmicrocracks,fractures,anddissolutioncavities.Thereservoirisdividedintotwotypesoftightsandstoneandtightsandstonelimestone.
Secondly,intermsofdistributionpatterns,theLowerShiheziformationsandstonereservoirexhibitsseveralcharacteristicssuchasasmallaspectratio,significantwaveformoscillation,largeinterlayerpressuredifferences,andlargedifferencesinmaturity.Accordingtogeologicalconditionsandporosityanalysis,thedistributionofthereservoirinslopesandupliftzonesismainlycontrolledbyshallowfaults,showingahighporosityandrelativelylowpressurepattern.However,inthelow-lyingareasofsedimentarybasins,thereservoirisrelativelystable.
Finally,basedonthecharacteristicsandpatternsofthereservoir,itisrecommendedtoadoptrefinedpredictionandfinewellnetworkdesignmeasurestostrengthenefficientdevelopmentofthereservoir.
Keywords:sandstonereservoir,tight,porosity,permeability,distributionpattern