弱成岩作用生物气藏储层参数解释模型研究

A study of quantitative interpretation model for reservoir parameters of weakly-compacted and loosely-cemented biogas reservoir

目的解决弱压实、松散胶结储层孔隙度、渗透率测井解释模型的精度一直难以达到储层精细评价要求的难题。方法对于孔隙度模型,提出声波测井曲线天然气影响的定量校正方法,实现应用“JD-581”常规测井资料建立孔隙度测井解释模型研究的需要;对于渗透率模型,从影响储层渗透能力的微观孔隙结构分析入手,以毛管理论为指导,综合应用各种资料,建立了渗透率测井解释模型。结果解决了该区长期以来无法利用声波测井进行天然气藏孔隙度参数解释的难题;提高了渗透率参数模型的解释精度。结论为该区储层定量的精细评价奠定了基础。

Aim To give a solution to the problem for the accuracy of the logging interpretation model of porosity and permeability to achieve the criteria of the intensive reservoir evaluation due to the weak-compaction and loose-cementation reservoir.Methods As for the porosity model, the quantitative correction method of gas influence on acoustic logging is explored; with regard to the permeability model, starting with the analysis of the micro pore structure that influences the reservoir permeability, and fully using all kinds of data,the permeability logging interpretation model is established.Results The methods put forward the resolution of the problem of the low interpretation accuracy of the reservoir physical property parametes in this area.Conclusion It is feasible to make the quantitative correction of natural gas effect on acoustic log by use of resistivity log; It is scientific and effective to interpret the reservoir permeability parameters by the guidance of the capillary theory, and the application of the test analysis and logging materials.