Evaluating method for residue geological reserves of compact heterogeneous reservoir stratum
A technology for heterogeneous reservoirs and geological reserves, applied in the field of natural gas development, can solve the problems of lack of calculation system and failure to accurately implement the evaluation of remaining geological reserves of tight gas layers in the Sulige gas field, etc., so as to improve the production of reserves. degree of effect
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Embodiment 1
[0049] This embodiment provides a method such as figure 1 The shown evaluation method for remaining geological reserves of tight heterogeneous reservoirs includes the following steps:
[0050] Step 1) Fine division of small layers: After using the characteristics of the marker layer to determine the boundary of the group, under the limit of the marker layer, the boundary of the section and sub-segment is determined according to the cycle characteristics, and then within the sub-segment, according to the sand body contrast mode and lithological combination The sub-segment strata are subdivided from the current sub-level to the single sand body level;
[0051] Step 2) Calculate the original geological reserves of the target layer;
[0052] Step 3) Combining the fine division of reservoirs in step 1), recalculate the original geological reserves of the target layer through reserve stratification calculation;
[0053] Step 4) According to the reservoir parameters, dynamic characteristics ...
Embodiment 2
[0059] This example takes the Sulige Gas Field as an example to carry out remaining reserves evaluation.
[0060] The Sulige Gas Field is a large-scale tight sandstone gas reservoir on land in my country. The main gas layer is braided river deposits. 8 ,mountain 1 Take the reservoir as an example, carry out reserve evaluation, and carry out the evaluation of used geological reserves, and confirm the distribution of remaining reserves, including the following steps:
[0061] 1) Using regional marker layer control, combined with the deposition cycle, the target layer box 8 ,mountain 1 Reservoir is divided into small layers; through the analysis of the sand body and effective sand body drilling rate and thickness of each small layer, the distribution range of the target layer reservoir is clarified, and through the reservoir configuration analysis, the effective sand body size and physical properties are described in detail , Provide the basis for step 3) Reserve recalculation;
[0062]...
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