Fine Reservoir Description And Adjustment Potentiality Study On Low-Permeability Reservoir Of Lin 10 Fault Block

On the northeast of Dalujia structure in Linpan oilfield and in the middle of northwestern source area and Huimin depression, Lin 10 Fault blocks are full of certain source surply, which determines its good growth of sand body.Due to its position close to southern Huimin depression, abundant oil source is supplied. Therefore, this fault blocks has good hydrocarbon accumulation condition.Compare reservoir by logging information and production performance, complete the study of reservoir plane and vertical reservoir, classify Es2x into five sand units, in this five sand units, sand body morphology of 1-2sand units,present potato, sand body of 3-5sand units distribute blanket connected. 3, 4 sand units are main layers.According to the analytical data of 3 core wells in Es2x, the porosity of Es2x is 13-22.3%, average porosity is 16.7%, permeability is 1.3-65×10-3um2, average permeability is 38.2×10-3um2, it is a low permeability reservoir. Using reservoir engineering method, calculating and ananlysing well pattern, producing reserves, waterflooding effect, drive enengy, work out the main problems during exploiting block:①energy preserved is little, the effect of development is bad;②the well spacing density is low, producing reserves is little.Using Xierkaqiaove formula, the relation between ultimate recovery and well spacing density, establish the rational spacing between wells between 200m and 270m. According to the effort of geological science research institute of Shengli Oilfeild, calculate technique ultimate waterflooding radius is 286m, technique ultimate injector producer distance is 572m.According to the characters of Lin 10 fault blocks, analysis potence and propose regulation proposal, adjust design and deploy according to fault blocks. Main block is Lin10-4 triangular well pattern, other blocks regulated referring to existing well pattern, propose driving 11 new wells, implementing 4 wells.