Shallow Gas Reservoir Evaluation In The South Of Daqing Placanticline

The Heidimiao oil layer at the southern of Daqing placanticline develops in the third and fourth section of the Nenjiang Group, and it belongs to the upper oil-bearing assemblage of Songliao Basin. Natute gas in this area is buried shallow, shallow gas over run fast, easily a blowout, well Chung phenomena, and the level of reserves size and production capacity is unclear, in view of this, carried out scale evaluation of shallow gas reserves in the south of Placanticline.This passage bases on the known of structure and sediment and organization of Heidimiao oil layer in the southern of daqing placanticline which made up by mother rock, reservoir bed and capping formation.through dissecting and analyzing gas reservoir which found in Heidimiao oil layer in the south of daqing placanticline. sum up its natural gas migration and accumulation pattern. How the underlying natural gas which generate by N1 and N2 mother rock along from T1 to T06 fault can migrate up to Heidimiao oil layer. And then along the sand to do a short distance lateral migration and go into the block or fault seal or fault– rock reservoir or anticline traps accumulation. The paper collects the study area of Heidimiao oil layer 1250 wells'SP and 2.5m bottom gradient receptivity log curve, combining with the existing lateral log and standard electrical well logging data and also combining local areas'compensated neutron, neutron lifetime information which after cover such as results of research conclusion. Do studing and analysing by utilizing local drilled Heidimiao oil layer product wells standard electric log map. And to establish electrical standards which divide by standard electrical well logging data to identify the division of natural gas layer. Ultimately, 949 gas wells are showed to explain, and gas layeres were divided; made 7 small layers'gas-bearing areal map in Heidimiao study area by log interpretation result. In the basis of these, natural gas geological reserves were estimated. through the study area well test data.We analysed Heidimiao oil productions'scale and implemented Heidimiao oil layer gas reservoir's develop potention under different economic and technological conditions...