Xinzhuang Oil-field Chang6Reservoir Water Injection Developmen Research Of Reservoir Engineering Scheme

Xinzhuang oil-field chang6reservoir structure is located in the middle and eastern areaof shaanbei slope in ordos basin, which thickness is about90-110m and petroleumgeological reserves is451.67×104t. An average of porosity is9.22%, An average ofpermeability is1.49×10-3μm2. At present, Xinzhuang oil-field chang6reservoiraccumulative total deficit is159900m3, it is very important premise for improving the effectof development that keeping formation pressure through the water injection in timecomplementing energy.Based on the basic geology research, the article study xinzhuangoil-field chang6reservoirs systematically, quantitatively, comprehensively. Including layergroup division and correlation, structure features, sedimentary facies analysis, reservoircharacteristics and oil reservoir distribution laws, etc. On the basis of the geological researchand reservoir numerical simulation the development plan is optimized, the optimal scheme inthe water injection development is predicted and the main knowing is followed:（1）Xinzhuang oil-field chang6reservior is delta sedimentary facies, the thing source is fromnorth east direction. Delta front and subfacies is sedimentary main body, including distributarychannel, debouch bar, overbank sand and branch bay, four micro phase type.（2）The analysis shows that the sand body along the main thing source direction exhibit, poretypes of the hole in grains is given priority to, with a small amount of grain in the hole.（3）The limit economic well spacing density is18.7mouth/km2, reasonable well spacingdensity is16.9mouth/km2, the present well spacing density is11.58mouth/km2, therefore ithas a larger encryption room for oil Wells.（4）The recovery of reservoir is predicted, the result is elastic drive process0.89%,dissolved gas drive process7.73%, with different method calculating the water drive processthe result is17.92%,28.8%, and the ultimate recovery value is17%.（5）Chang6reservoir is developed accoding to the one development group, the optimumperfect the well water injection scheme network at nine o ’clock, always well number for156mouth, of which125oil Wells in the mouth, injection Wells and mouth,injection-to-production-well ratio for1:3.8, among which new design production and mouth, injection Wells2mouth,there are4mouth oil Wells changed into injection Wells, the waterflooding control area is11.28km2.