Description On The Third Reservoir Of Funing Formation In Sha 7 Fault Block Of Shanian Oilfield

Sha7 fault-block of Sha nian oilfield funing group three reservoir since September 1994 investment development, has never been a system of reservoir description research. After years of development, many contradictions exposed, main show is the lateral changes of reservoir, reservoir heterogeneity is strong, and serious water main sand body and residual oil distribution law is not clear. Aiming at these problems, the use of geological, well logging, seismic, testing, and development and production of such information, the small layer of fine contrast, micro structure analysis, the research of sedimentary microfacies, such as technology, dynamic and static combined describes the funing group of three sections of reservoir characteristics, the fine 3 d geological model was established, the following results and understanding:(1) The study of depositional cycle through sand body, set up fine stratification standard comparison and sand body framework; Think is given priority to with thin interbed reservoir, lateral continuity is better, but poor reservoir continuity.(2) Think funing group three sand body exist on micro structure diagram 3 ~ 4 micro structural highs, local have different degree of pinchout sand body, this knowledge to explain the sand well 7-33 well group dynamic and static development contradictions.(3) To determine sedimentary microfacies types, reveal the rule of sand body distribution, think three sections of funing group reservoir is given priority to with sand sheet, underwater distributary channel sand body and mouth bar sand body are relatively development; Article mainly in sand body plane form banded, potatoes, or elliptical, sheet, finger and irregular shape; Sand body profile morphology are mainly on the flat, convex, flat on convex, pods, thin layer of the pie.(4) Three sections of funing group overall reservoir physical property is poor, for the hole, in low permeability reservoir; The physical property of s and body is controlled by sedimentary microfacies, physical properties of the sand bodies of different genesis, underwater distributary channel and river mouth bar sand body of better properties. Storage layer upon layer, interlayer and plane are showing strong heterogeneity; Longitudinal on local wellblock is the main channel, main sand body severe flooding.(5) Think funing group three reservoir throat radius is small, movable fluid saturation is low; Mainstream throat radius, movable fluid saturation and permeability are in a good positive correlation logarithmic relationship.(6) To implement the three sections of the funing group reservoir oil geological reserves; Report from the point of calculation results, the calculation of reserves with proven reserves has also ground to a close, error is smaller.(7) Established the three sections of funing group reservoir 3 d geological model of the test are in good agreement with the development and production of dynamic.The abo ve research and de velopment and comprehensive adjustment and understanding in the study area of chemical flooding to improve oil recovery produced good application effect.