特低渗气藏水平井分段多级压裂数值模拟研究

东海海域低孔低渗天然气资源丰富,而海上低孔低渗油气开发属世界性难题。结合海上生产实践表明,对于渗透率在(0.1~1)mD之间的特低渗气藏,压裂乃至水平井分段压裂是目前已知唯一有效的开发方式。对于东海M气田深层特低渗气藏开发,需要实施一口多级压裂水平井。在综合考虑各项油藏实验参数的基础上,依次对该井进行井位优化和压裂参数优选,最终给出推荐方案及预测开发指标,形成了一套低渗气藏压裂数值模拟数据处理方法,完成了M气田压裂数值模拟研究,对后续东海低渗气藏开发数值模拟研究具有借鉴意义。

The East China Sea is rich in natural gas resources with low porosity and low permeability,and the development of offshore oil and gas with low porosity and low permeability is a worldwide problem.The production practice show that fracturing and horizontal well fracturing are the only effective development methods at present for extra-low permeability reservoirs with permeability between(0.1~1)mD.For the development of deep extra-low permeability gas reservoirs in the East China Sea M gas field,we need to implement a multi-stage fracturing horizontal well.On the basis of comprehensive consideration of various reservoir experimental parameters,the well position optimization and fracturing parameters optimization are finished in turn.Finally,the recommended development plan and the prediction of development indexes are given.A set of pre treatment method for numerical simulation data of low permeability gas reservoir fracturing is formed,and the numerical simulation study on fracturing of M gas field is completed.It can be used for reference in the numerical simulation of the development of low permeability gas reservoirs in the East China Sea in the future.