Study on classification of conglomerate oil reservoir and oil layer based on rock mechanical properties
Tight conglomerate reservoir in Mahu area is the main producing area in Junggar Basin,but there are differences in different strata reservoir characteristics,complex lithology,physical property and mechanical property difference is big,the geological characteris-tics and production dynamics show some contradictions,physical condition good regional production is not necessarily high,in the tradi-tional sense reservoir classification model based on the geological parameters can not be well explain the reason of the difference of pro-duction,restricted the well further follow-up production potential evaluation.Based on the geological engineering integration thinking,a classification standard for low brittle rock debris conglomerates was formulated.By calculating key mechanical parameters such as shear waves,dynamic and static Young's modulus,a comprehensive rock mechanics model for conglomerates in oil reservoirs was established.Based on rock mechanics model and combining with the practical production indexes,a new"four quadrant"classification standard for conglomerate oil reservoirs and oil layer was formed,with resource(porosity,saturation)as the main factor and modification(brittle-ness)as the auxiliary factor.The prediction accuracy of the mechanical model was more than 90％,and the interpretation results of the model were in good agreement with the experimental data of the core and the test data of the liquid production profile.The classification of conglomerate oil reservoir and oil layer provided a favorable basis for fine evaluation of horizontal well productivity,accurately guided the optimization of fracturing design and production control of horizontal wells with different quality reservoirs,and realized the simulta-neous improvement of single well production and economic benefit.
万方数据
维普
