Key Zone Reservoir Prediction Research On Huabei Oilfield

In this paper, with fault extensional basin sequence stratigraphy, petroleum geology as a guide, with residual oil and gas well point as clues, high precision prediction techniques are used to predict reservoir distribution. Sedimentary micro facies classification and core analysis data are used to determine the favorable sand body characteristics. Then the fluid detection technology is used to scan the favourable sand body. Finally, structure, sedimentary, reservoir and hydrocarbon characteristics are integrated for sweet point optimization. Take Shahejie formation in Nanmazhuang area of Raoyang depression as the goal, reservoir prediction is carried out.In the process of research, with the using of stratigraphic correlation, horizon calibration, fine structure interpretation, reservoir prediction, sedimentary facies research, trap evaluation and other related technology, five major series of technology and25items are formed for area exploration targets prediction.1. Technology series of logging data processing and interpretationThe well logs are processed and interpreted by using the technology of logging data analysis, baseline drift correction, logging curve standardization and permeable layer interpretation. The basic data of logs, tops, logging, oil test data and original interpretation conclusions of62wells are loaded. The name and unit of logs are unified. The baseline drift of spontaneous potential logs are correct and standardization of sonic log are carried out, and the permeable zone of62Wells are divided.2. Technology series of fine structure interpretationThe technology of synthetic seismogram, horizon tracking, coherence analysis, ant tracking, horizontal slice analysis, variable velocity mapping and tectonic evolution and palaeostructure recovery are adopted for structure interpretation. According to the characteristics of research reservoir of small fault block traps and complex fault system, for the first time, a technique of fault interpretation is formed, which integrated "coherent-ant body-horizontal slice-artificial review" technology. This provides a more effective means for increasing the precision of fault recognition.3. Technology series of sedimentary facies comprehensive studySedimentary facies of each interval are studied through the stratigraphic classification and correlation, facies classification and analysis of single well and associated wells, combination of well and seismic sedimentary facies analysis and comprehensive mapping technology. More than40results maps are compiled through the multidisciplinary materials integrated use of drilling, well logging, mud logging, geological and seismic study;4. Series of reservoir prediction technologyWith the difficulty of thin thickness of shahejie monolayer, low seismic resolution and the sonic not sensitive to lithology in work area, data analysis technology, post-stack seismic multi-attribute analysis technology, electrical response characteristics analysis technology, conventional inversion and pseudo sonic inversion technology, and lithology interpretation technology are adopted for reservoir prediction. The preferred methods of Impedance inversion,that the pseudo sonic produced from SP, specify frequency energy ratio and RMS amplitude better reflect the reservoir variation form a set of effective method to predict reservoir in this area;5. Technology series of exploration target evaluation and optimizationThrough the technology use of accumulation conditions analysis, evaluation after drilling, study of oil and gas enrichment regularity, trap identification, resource calculation, the research of hydrocarbon accumulation system is carried out. Based on analysis of defeat well and the law of oil and gas enrichment, the favorable traps are searched, then the main controlling factors of reservoir forming are put forward.Through the implementation of this project, the hydrocarbon reservoir-forming conditions, enrichment regularity and the main control factors of reservoir are summarized. According to the structure and sedimentary characteristics,5drilling targets are determind and6wells sites are deployed. It has an important guiding role in further exploration of RaoYang depression. The five technology series formed in this study has a certain guiding significance to promote reservoir prediction and software application of Huabei Oilfield...