Based On The Research Of Remaining Oil Saturation Of RPM Log Interpretation Method

Oilfield production, its production changes with the change of formation oil saturation, oil and gas production will decrease, the output of water will rise sharply. Real-time and accurate understanding of the formation of dynamic change, monitoring of formation oil saturation and log analysis method is adopted to realize the watered-out degree, and evaluation of formation and to guide the rational effective development of oilfield late, enhance reservoir recovery has an important meaning, this would require the remaining oil saturation parameters as the basis. Many in the open hole logging method, due to the limitation of the physical characteristic of the casing is not applicable in cased hole formation evaluation. Currently most of used in cased well saturation logging methods are based on nuclear well logging method on the basis of the theory of nuclear physics, such as:carbon-oxygen ratio (C/O) spectral logging, PNN logging and neutron lifetime logging (TDT), PND unit logging, boron neutron logging, etc. In this paper, based on RPM logging method, remaining oil evaluation in L oilfield as the research object, on the part of the problem existing in the RPM log interpretation of discourse analysis, then the remaining oil saturation calculation model is set up, the research block on residual oil and water flooded condition evaluation, finally in the form of software implementation based on the results of the study, for instance the well explain the process validation.Reservoir Performance Monitor RPM (Reservior Performance Monitor) is production of Atlas company, is a new type of multi detector, multi-function pulsed neutron logging tool, its size is 1.7 in, can be in the production of tubing or casing borehole measurements, but also with production logging tool (PLT) combination. Main advantage of carbon oxygen ratio logging is able to penetrate casing, cement loop and measure the elements in the formation directly, not affected by formation water salinity. When difference between the formation water salinity and injected water is large, this method has prominent advantages, especially in the high porosity formation has a good application effect in the test. At present, it overcomes the electrical logging cannot be used to evaluate reservoir saturation in the casing well, and makes up for a neutron lifetime logging can not be used in low salinity of formation water area. It can directly react some characteristic elements content in formation, provide the formation physical property, lithology, oily and effective thickness and other information, you can also provide dynamic underground gas, oil, water and parameters such as capacity, residual oil saturation and productivity index.The purpose of this paper is to analysis from the RPM logging process, evaluate the adaptive of the RPM tool in the research of block, set up a log quality control standard for the blocks, and in the process of RPM logging affected by a series of environmental factors, such as:formation porosity, oil saturation, annulus fluid, gravel and other influence factors analysis, put forward the RPM logging annulus fluid and gravel pack correction methods, and in view of the research block actual situation to determine the main controlling factors of the RPM logging, and establish appropriate interpretation model.In remaining oil saturation evaluation and water flooded layer identification part, combined with evel division standard of water flooded layer in domestic and foreign oilfield, set up suitable for the block level division standard of water flooded layer. Combined with open hole data and geological data at the same time, by adopting the combination of dynamic and static methods for the determination of water level and effectively to improve the accuracy of the evaluation of water flooded layer.Finally, based on RPM interpretation model established in the logging data interpretation, compiled the RPM log interpretation module for the block, make the presented model method is implemented in the form of software, and validated through the practical application, think of the model in this paper has a certain popularization value.