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为了研究深层洞穴型油藏改建地下储气库的可行性,以洞穴型油藏地质特征为基础,通过MATLAB编程计算注入压力,分析深层洞穴型油藏改建地下储气库的可行性,推导建立库容预测数学模型,并通过物理模拟实验验证库容预测数学模型的可靠性。研究结果表明:洞穴型油藏改建为储气库具有一定的可行性,但对地面注入压力条件要求较高,地面注入压力上限为45 MPa,日注气量为10×104m3时最优;物理模拟实验可较好地模拟洞穴型油藏注气采油过程,并可形成储气库;实验库容大小与数学模型计算结果误差较小,所建库容计算模型具有一定的可靠性。
In order to study the feasibility of rebuilding underground gas reservoirs in deep cavernous reservoirs, based on the geological characteristics of cavernous reservoirs, the injection pressure was calculated by MATLAB programming and the feasibility of rebuilding underground gas reservoirs in deep cavernous reservoirs was analyzed. The mathematical model of reservoir capacity prediction is established. The reliability of the reservoir volume prediction model is verified by physical simulation experiments. The results show that it is feasible to reconstruct cavern reservoirs as gas reservoirs, but it has higher requirements for ground injection pressure. The upper limit of injection pressure is 45 MPa and the best daily injection rate is 10 × 104 m3. The physical simulation Experiments can well simulate the gas injection and recovery process of cavernous reservoirs, and can form gas reservoirs. The error between the experimental reservoir size and the mathematical model results is small, and the calculated caisson model has certain reliability.