Research On Development Methods For Bonan Oilfield Yi 34 Block Sha Three Section In 2+3 Sandstone Reservoir

Bonan Oilfield yi 34 block is located in Hekou District of Dongying City, which is in the northern part of Bonan subsag in Zhanhua sag, the north south of Chengdong arch, Bonan sag,and across the two district, eight district in Bonan oilfield is a fault block, the two step of Chengnan fault belt, in Sha three section in large sets of source rocks District, is a deep,structural, lithologic control in abundance, low permeability reservoir.Block of oil well has some natural productivity, fracturing effect is obvious, but the productivity decline quickly, so the water injection to supplement the formation energy is very important. Water has the following characteristics: the feasibility that construct South Zone of a single, contiguous distribution of reservoir rock wettability categories; for strong- type;according to the reservoir sensitivity study results, reservoir sensitivity is not strong, is conducive to water injection development. So have the injection condition, attempts to use the long horizontal section casing multi-stage fracturing horizontal well water flooding.Determine the injection pressure, injection timing and on the plane, vertical position selection,and the horizontal well orientation, well spacing optimization.The feasibility of water injection, deployment, deployment principle is the casing water injection development based deployment of well pattern, well trajectory perpendicular to the stress direction, horizontal well trajectory as long as possible, since the structural high part of drill to the lower location of the structure; A target should be located in the reservoir with relatively larger area and thickness of the implementation, ensure drilling target success rate.Through the study of yi 34 sand three 2+3 sand group development way, the long horizontal section casing multi-stage fracturing horizontal well water flooding, the deployment of long horizontal multi-stage fracturing horizontal well, can effectively improve transformation of low permeability reservoir, block water flooding producing reserves,improve development efficiency block.