Huimin Depression Jishan Logging Of Reservoir Properties Of Sandstone Bodies Explained

Porosity and permeability of reservoir are the basic and important parameters in well logging interpretation. They are very important for determination of oil-bearing reservoirs and computation of reserves. Currently, there are many methods to interpret these parameters, such as Archie formula method, mathematical statistics and regression methods, flow units methods and new methods based on Nuclear Magnetic Resonance (NMR) log data.These methods have their adaptability respectively. And it relies on the complexity of region's geologic settings, the quantity and quality of region basic data, and appropriate logging suite how to select the best and effective method among them. This paper discusses mainly the work area of JiShan sand body in HuiMin depression. As a whole, the reservoir is lower porosity and lower permeability. The well logging data include the early analog recordings, digital and direct digital logging, and a small quantity of NMR logging data. The paper try to interpret porosity and permeability from these logging data by using the method such as mathematical statistics method, flow units method and NMR interpreting method. And it wants to get the best and most suitable methods for JiShan or HuiMin by comparison of these methods. So we can take advantage of various data fully, as well as provide important and basic data or parameters for exploration of oil-bearing formations, increment of reserves and Enhanced Oil Recovery (EOR).The paper gives the basic principles and implementation approaches of logging data normalization, mathematical statistics, flow unit and NMR technique. Some interpretation models were set up according to the logging data and core analysis data of this region. Some well logging data were processed and get some basic conclusions on how to select and apply these interpretation models. A relative mature methodology which suited for this region was gained. The work established an important base for distinguishing oil and water, integrative geologic research and comprehensive interpretation for the future.