轮古碳酸盐岩储层测井解释评价技术

轮南潜山是一个古生界残余古隆起，储层以碳酸盐岩次生“孔、洞、缝”及其组合为主要储集空间，极不均匀地分布在几乎不具储、渗的碳酸盐岩基质中。流体既有稠油、正常油、凝析油、湿气，还有矿化度突变的地层水，分布极为复杂。测井技术在轮南潜山的油气评价中受到了严峻的挑战，同时勘探开发迫切要求测井技术在油气藏描述中发挥出高分辨率、高精度的作用。针对上述问题，引入和发展了新的采集技术、解释技术，在消化、吸收、总结前人的经验与教训中，逐步形成基于成像测井为主体的碳酸盐岩储层测井描述技术和储层参数定量计算技术。在碳酸盐岩的测井解释方法、储层参数建模、成像测井处理等方面有所创新，满足了本区生产和储量计算的需要。应用这些技术，测井解释符合率由最初的65%提高到90%以上，多口老井经重新解释后获得了高产油气流，所计算的储层参数为该区上交亿吨储量做出了重要贡献。

WELL LOGGING INTERPRETATION AND EVALUATION TECHNOLOGIES OF PALEOZOIC CARBONATE RESERVOIR IN LUNNAN

Lunnan burial hill is a relic Paleozoic palaeohigh. The main reservoir spaces include secondary "pores, cavities and fissures" and their combinations in the carbonates, and they are very unevenly distributed in the carbonate matrix almost with no reservoir quality and permeability. The types of formation fluids include heavy oil, normal oil, gas condensate, wet gas and formation water with saltatory salinity and their distributions are very complex. Logging technologies are faced with big challenges in oil and gas evaluation in Lunnan buried hill, while it is urgently needed to bring the advantages of high resolution and high accuracy of logging technologies into full play in oil and gas reservoir characterization. In view of the above problems, new acquisition and interpretation techniques are introduced and developed. Logging characterization technology of carbonate reservoirs with imaging logging as the main basis and quantitative calculation technologies of reservoir parameters are successfully developed through digesting, absorbing and summing up previous experiences. Innovations have been made in respect of carbonate logging interpretation, reservoir parameter modeling and processing of imaging logging data, and they have basically met the requirements of calculation of oil and gas production and reserves in the study area. Coincidence rate of logging interpretation has increased from the initial 65% to present over 90%. Several old producers flow again after reinterpretation. The calculated reservoir parameters have made great contributions to the newly discovered and reported 100 million tons reserves.