延长油区探明未动用地质储量开发动用对策

Development strategy of proved undeveloped geological reserves in the Yanchang oil region

伊陕斜坡东南部延长油区的探明地质储量虽然平面动用程度总体较高,但仍有2.7×10^(8)t探明地质储量未得到有效动用,主要分布在延长组长2和长6两个主力油层,分别占34.4%和41.4%。为合理有序建产、提高探明地质储量动用率,以延长油区探明未动用地质储量为研究对象,分析探明未动用地质储量的平面和纵向分布规律及未动用原因,厘清地质条件、落实地面条件或环保允许的探明地质储量分布和规模,并针对性提出探明未动用地质储量高效开发对策、动用程序和技术攻关方向。研究表明,延长油区探明未动用地质储量可分为近期已规划动用储量、暂时不可动用储量和长期不可动用储量三大类,通过实施相应的技术对策和进一步研究攻关,预计可增加探明动用地质储量20237.59×10^(4)t,新建原油产能(107~155)×10^(4)t/a,将为应对低油价、实现油田高效开发、保持长期稳产做出积极贡献。

Although the development degree of proved geological reserves is generally high on the plane in the Yanchang oil region which is located in the southeastern part of Yishaan Slope,there are still nearly 270 million tons of geological reserves that have not been used effectively.Longitudinally,they are mainly in the oil layers of Chang 2 and Chang 6 members of the Yanchang Formation,accounting for unused rates of 34.4%and 41.4%,respectively.In order to reasonably and orderly build production capacity and increase the utilization rate of proven geological reserves,taking the proved undeveloped geological reserves in the Yanchang oil region as study object,the company analyzes the plane and vertical distribution,and the reasons for undeveloped geological reserves,makes clear the distribution and volume of proved geological reserves with favorable geological conditions,or accepted by environmental protection and ground conditions.Then the strategies,utilization procedures and technical research directions for efficient development of proved undeveloped geological reserves are put forward.The results show that the proved undeveloped geological reserves can be divided into three categories in the Yanchang oil region:near-term planned producing reserves,temporarily undevelopable reserves and long-term undevelopable reserves.Through classification and adjustment of development policies combined with further research,it is estimated that the newly increased proved developable geological reserves are 20237.59×104 t and the newly-built oil production capacity are(107-155)×104 t/a,which will make a positive contribution to coping with low oil price,realizing efficient oilfield development and maintaining long-term stable production.