Predict The Target Area Of Putaohua Reservoir In PU26-66 Block, Song Liao Basin

The B26-36 well Block locates San Zhao Sag of Song Liao Basin, Putaohua reservoir is the main reservoir. Now, drill rate is low, The main reasons is the low recognition of tectonic, sand stretch and accumulation regularityThe paper carried out tectonic explanation, sedimentary microfacies and sand prediction which is the main work, By using geological material geophysical and production material. With the help of work mentioned Before, make sure the target area By using accumulation law. Results as following:(1)Carrying the tectonic explanation By using 3-D seismic material, make sure the most high area locates at southwest, with the characteristic “southwest high—northeast low, fall down like ladder”. Normal fault crisscross mesh grid formation, development of horst, graben, ladder shaped Block and lung in rift tectonic types.(2)By using curve material,make sure Putaohua reservoir is the Delta front subfacies, develop two kinds of microfacies : the underwater distributary channel and sand sheet. The one underwater distributary channel stretches from northwest to northeast, the other stretches from north to south.(3)Predict sand distribution By using Sparse pulse wave impedance inversion and multivariate geological attributes of statistical techniques. The reservoir thickness Between 7 m and 14 m. The one sand stretches from northwest to southeast, thickness Between 10 m and 14 m, the other stretches from middle to east, thickness Between 7m and 14 m. The rest area is thin and discontinuous.(4) In the full knowledge accumulation characteristics and main control factors,, clear the area development step, horst type and graben type three main reservoir pattern, the establishment of a suitable optimization standard, and optimizing the three areas favorable for type I and 1 areas favorable for class II.