The Reservoir Anisotropism Studies In The Lion Ditch Oil Field N₁ Oil Reserve

Reservoir anisotropism is refers to the attribute reservoir characteristic the parameter in the spatial nonuniformity. In the development reservoir appraisal, the reservoir anisotropism is refers to the reservoir to have the dual anisotropism, namely the tax savesthe fluid nature which the fluid in the rock anisotropism and the rockspace the tax saves and produces the shape the anisotropism, direct influence oil field mining effect.The reservoir anisotropism research is the oil deposit description (Reservoir Description Service) in the technology one of oil deposit geology research primary coverages. The present paper content subordinate "describes the project sub-topic to the lion ditch oil field N₁ oil deposit oil deposit". Through makes the appraisal to the N₁ oil deposit developmentreservoir, take the anisotropic research as the leadership, in view ofthe reservoir structure characteristic, the sedimentary facies, thereservoir sensitivity, "four nature" aspect and so on relations,reservoir sand attribute, reservoir parameter and fluid anisotropismhas made the careful analysis.Under the areal structure background control, through to the regionalgeology, the ground detailed survey material as well as the biglamination contrast research, has been clear about the N₁ oil depositmain reservoir; And the basis lithological character, the electrical characteristic,the redesign this area key bed constructional drawing, specially hasdrawn up the tiny structure graphic document using computer software,then has determined the N₁ oil deposit structural types and the oildeposit type; Meanwhile take the oil deposit smallest unit reservoir sand as thefundamental research object, gradually develops the main forcereservoir sand, the main force subzone characteristic analysis,determined the main force reservoir sand, the main force subzone spacemops with the distributed rule.Based on the geological laboratory analysis chemical examinationmethod, to characteristic and so on lithological character,granularity and sedimentary structure has made the multianalysis, West the Qaidam Basin firewood in the local tertiary period evolution deposition big environment, subdivides the N₁ oil depositthe deposition and micro resembling, the union bore logcharacteristic, found has been advantageous brings; With the aid of the core sample observation, the thin slice appraisal,analysis result and so on clay mineral X diffraction, scanningelectricity mirror, has determined the N₁ oil deposit reservoirdiagenesis type, the stage and the sensitive characteristic.In massive geological and in the chemical examination analysisfoundation, conducts the research to the reservoir and the fluidanisotropism. Relatively takes the core well selection from three systems newer totake the core well to take the essential well, union oil well loggingsoftware explained the achievement makes the core to turn over to theposition, achieves the explanation effective thickness the precision; Carry on "four nature" with the aid of the analysis chemicalexamination and the electrical measurement data the analysis,discovers "four nature" between the parameter correlational dependenceequation, through presses the mercury experiment, casts the body thinslice material further to analyze the reservoir parameter and the holecharacteristic, And uses SURFER software, a utilization K.L.J law to variouswell points mean permeability, the coefficientof variation, theadvance coefficient, the average porosity, the level inferior non-isotropic parameter carries on the analysis forecast, discovered thereservoir various parameters attribute the anisotropism hasapproximately the same change tendency.The favorable oil used, the water ground sample and the mine shafthigh pressure nature sample oil layer physics experiment material hasmade the analysis to the N₁ oil deposit fluid nature, The oil density, the viscosity, water data and so on hardness indexdraws up the isogram and the superimposition with SURFER software onthe constructional drawing, Was clear about the fluid also to have the anisotropism, also thefluid anisotropism came under the reservoir anisotropic influence andthe control. This research content has made a finer description for this oildeposit reservoir research, The main achievement is: Unified has been static, the dynamicmaterial, to aspect and so on reservoir characteristics, fluidcharacteristic and anisotropism drew the explicit conclusion. And discovered that, The reservoir anisotropism is mainly controlledto factor and so on environment of deposition, diagenesis and crackgrowth situation. And suggestion use correlation software, in thereservoir conceptual model foundation the establishment static model,simultaneously synthesizes the appraisal reservoir.Our country at present began the development the oil field mostly toenter high contains water time mining , The request has a more precise description to the underground oildeposit three-dimensional space microscopic change, this designconforms to the actual oil deposit model after the establishment,instructs the production development plan the further implementation,its research has the important theory value and the practicalsignificance.