Feasibility Research On Oil And Gas Development In Oil-water Transition Zone Of Sayi Reservoir In East Flank Of Lamadian Oil Field

By using the technology of seismic, drilling, core analysis and test methods, theintegrated use of petro logical analysis, earthquake and so on， combined with thestructural section, stratigraphic dip, tectonic isoline method, this paper have determinedthe fields outside expanding boundary, sedimentary sand body features. Through the studyof lamadian oil-water interface and oil-water boundary, oil-water interface and the oilboundary in the lamadian oilfield have been determined, The average oil-water interfacehas moved down for about3m, compared with the study in1999,the oil-water boundaryhas slightly moved out in sayi reservoir reservoir group compared with yuantiao stripe, themaximum range has moved out for110m~190m; The transitional zone of lamadianoilfield development potential has been paid attention to, the potential capacity oftransition zone, the transitional zone expansion advantage of the choice of blocks havebeen known, and through the calculation of reserves, clear transitional zone expansionblock reserves are confirmed, through the new calculation of the oil-water boundary insayi reservoir, the geological reserves can be increased by35x104t, calculated at20%, itis expected to increase7.0x104t; At the east wing of lamadian oilfield, sayi reservoirgroup oil-water transition zone sedimentary characteristics of system analysis, has beenclear about the east wing lamadian oil field, the structural characteristics of sayi reservoirgroup oil-water transition zone, sedimentary characteristics, reservoir physical propertiesand the distribution of the unit interval and interlayer have been confirmed, the drawing ofthe east wing in lamadian oil field, sedimentary treatment has been finished by using GPTmap software; an evaluatio was made on sayi reservoir group oil-water transition zone ofthe physical characteristics and sensitivity, the geological reserves in the study area and evaluation of development potential is determined, compared with the crude oil waterboundary, Sayi reservoir group has increased oil bearing area of1.27km2; Compared with2001, Sayi reservoir group has increased the geological reserves for about122.1x104t;Calculated at20%, the recoverable reserves of44.6x104t.. Through the study intransition zone of lamadian oilfield, we have determined that the east wing lamadianoilfield, sayi reservoir group oil-water transition zone is feasible for oil and gasdevelopment. The research work of this paper also has reference significance to the basicresearch on similar oilfields.