Logging Reservoir Evaluation Of Tight Oil Research In ZH Area

There are many differences between tight reservoir and conventional reservoir. The properties of low porosity and low permeability make the reservoir fluid weaken in the logging response characteristics?Add on the plateau of the saline lake basin sedimentary drilling difficulties increase, the influence of borehole factors increase, resulting in some of the logging information of formation does not reflect the true, so tight oil reservoir layer logging fluid identification and evaluation more difficult.Through the study of domestic and foreign oil exploration and development technology, according to their own practical experience, combined with the previous research data, The conclusion is that the use of the western CHAIXI Basin in ZH area dense oil reservoir with low porosity, low permeability, low content of organic carbon, high-quality hydrocarbon source rocks is mainly mudstone, strong heterogeneity, diversity of mineral composition, physical changes of reservoir, fluid property diversity characteristics.Based on the rock properties and reservoir parameters, this paper includes the parameters of porosity, gas content, permeability and so on. Firstly, the effective identification method of hydrocarbon source rock is formed by combining the core and geochemical data, and the model of high accuracy TOC calculation is established by using the experimental analysis data. Secondly, according to the geologic structure and the multi well interpretation, carry out the plane distribution of the TOC, to determine the dominant source rocks and distribution characteristics?Thirdly, combined with the test oil and the core data, the relationship between the vertical source and the characteristics of the combination is defined. Through the core scale electric imaging, the whole rock analysis scale rock properties scanning logging, rock properties scanning scale natural gamma ray spectrum data to establish the high precision rock properties identification. standard. Based on the accurate identification of rock properties, the classification criterion of effective reservoir is established through the response characteristics of well logging curve. According to the study of the relationship between the reservoir and the four character, the main controlling factors are defined, and the high accuracy physical property evaluation model is established according to the well logging data. The high accuracy analysis of rock properties and physical properties, combined with the electrical characteristics, establish evaluation standard setting logging fluid properties of semi quantitative. Through the effective hydrocarbon source rocks and reservoir distribution characteristics and layer thickness, set up to assess the relationship between fluid properties and hydrocarbon source rock and sand body. Using electric imaging logging and array acoustic wave combined with rock mechanical characteristic analysis test data, to carry out the evaluation method and standard of the engineering quality, such as brittleness and the opposite sex.At the end of the paper, the evaluation of rock mechanical parameters and fracture development index is also carried out. A series of work combined with test oil and several key wells of oil production, the project is relatively high, basically completed the establishment of the reservoir evaluation criteria for the zone. Provide technical support for the development of efficient follow up.