Seismic Interpretation And Study On The Characteristics Of Fault In Putaohua Oil Layer In Gulong Oil Field

Gulong oil field located in Datong area of Daqing city of Heilongjiang province. With the increase of oil field exploration degree, the accuracy of seismic interpretation in this area before can not meet the needs of actual production of oil field, it is very necessary to interpret horizon and interpret faults high accuracy(bayanchagan, talaha, changjiaweizi, longnan).Moreover, oil-water relationship is very complex, there are lots of control factors, so it is need to study the influence of the geometry and kinematics of faults, the structure, microamplitude,fault sealing property to oil-water distribution, in order to analysis and summary the main control factors of oil-water distribution.Take sequence stratigraphy and structural geology as a guide, make full use of seismic data and combine drilling, logging, test oil, core and other data, take loging seismic combination as prerequisite, use large scale to interpret horizons by line interpretation, and use a variety of coherent combination and 3D visualization technology to interpret faults and draw depth structure figure of the layer of Putaohua, use trend surface and manual identification to identificate the microamplitude structure. Have counted the the geometry and kinematics of faults, and used the SGR method to evaluate the lateral sealing property of faults. Come to the following conclusions, the top surface of the target layer appears "one sella two depression three bulge", 47 traps and 80 microamplitude structure were identificated.Fault dense zone has a great control influence on the trend and extension range of river sand body, horst, graben, forward and reverse fault step have possibly to be hydrocarbon enrichment region. The main activity period of faults are Qingshankou, Yaojiazu and Nenjiangzu. Lateral sealing of faults is mainly good and medium, and the poors are mainly concentrated in west slope and the good sealing faults have a good shielding effect on oil gas.Have analysised the influence of microamplitude, fault combination, period, dense zone and lateral sealing on oil-water distribution, gived three preferred wells.