Small scale sandstone fracturing, water injection and huff and puff increase in Jidong 12-42 high oil field
China oil network news as of September 21st, 12-42 wells in Jidong Oilfield fracturing injection can increase after 2 mm choke cumulative flowing production 21 days, water cut decreased, marking the first export of small scale oil sand fracturing water injection pilot test success.
Because small scale sand bodies can not establish effective injection production relation, they can only be exploited by elastic energy after fracturing. They have many problems, such as rapid production decline, short effective period, less oil production and poor benefit. Major projects of oilfield fracturing development Jidong group innovation proposed "three-dimensional development model of piecewise fracturing and multiple cyclic steam stimulation development, segment replacement", through multiple rounds of stimulation fracturing + storage yield improve development effect, to achieve the maximum degree of recovery. The main mechanism of water injection stimulation include increasing formation energy, gravity separation or exclusive dialysis, oil-water replacement, increasing or recovering reservoir permeability, etc..
High 12-42 wells water injection pilot test can increase success, demonstrated the feasibility of small sand body three-dimensional development, the Jidong Oilfield ultra-low permeability reservoir water injection, difficult to effectively use development ideas and provide new technical support.
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