A Study On Reservoir Heterogeneity Of Thick Oil And Horizontal Well Technique In LaSaXing Oil Field

Althugh Daqing Oil Field has already entered in the later period of strong water ,because of the infection of thick oil reservoir heterogeneity , exploitation degree of water drive is just 32% around. A great deal remaining oil exist in thick oil. The chiefly task is to describe heterogeneity of this type of reservoir.To improve effect of oilfield development, developing A Study on reservoir heterogeneity of thick oil and the field tests on horizontal well in LaSaXing Oil Field.The project has studied the distinguish methods of monosandbody , the distribution patterns of the interlayer, adopting synthetical analysis on sand body sections,the hydrodynamic parameters and distinguish methods. Through using digitizationlog information generate correlation section ,develop fine correlation of single stream cycle layering. The certain unit was divied facies,subfacies,finefacies on plane,and monosandbody was dissected particularly to found distributed model of facies and sandbody. Subfacies and monosandbody was divided into flow unit. Classification characterization model was based. On the base of the study, the project has established the 3D geological models of horizontal and inclined interlayer, and has got fundamental development in reservoir simulation. On the base of the study, the project has established the 3D geological models of horizontal and inclined interlayer, and has got fundamental development in reservoir simulation.And the project has modified and perfected the model through numerical reservoir simulation.The field tests on horizontal well are performed in Lamadian, sazhong, xingbei, and xingnan oilfield.The project has achieved the reservoir engineering design of six horizontal wells in which four wells have been completed. advanced on optimizing design of horizontal well's formation, location, trajectory and perforated intervals of high water cut oil reservoir, ensure the engineer of horizontal well. The project ascertains that watered out problem of drilling horizontal well in thick oil may adopt some measures to control and release,such as extending level sect'length of horizontal well,strengthening water flooding to thick oil top,controling production pressure differential.The project has acquired some technical breakthrough and innovative production in the distinguish of monosandbody,the inner sandbody structural of description and advanced on optimizing design of horizontal well's .Particularly the distinguish and the description on intercalated bed inner sedimentation unit has further deepened cognition for reservoir heterogeneity of LaSaXing oil field .