Prediction method suitable for ordovician Ma5-5 gas reservoir dolomite reservoir

A prediction method and Ordovician technology, applied in prediction, data processing application, geophysical measurement, etc., can solve the problems of reducing drilling success rate, increasing production capacity construction risk, unreliable evaluation results, etc., and achieve the effect of improving development effect

Active Publication Date: 2018-02-02
PETROCHINA CO LTD
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Problems solved by technology

These methods are only for the prediction of surface karst carbonate reservoirs, and do not involve Ma Wu 5 The diagenetic mechanism and influencing factors of dolomite in the early stage are analyze

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  • Prediction method suitable for ordovician Ma5-5 gas reservoir dolomite reservoir

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[0024] In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.

[0025] Such as figure 1 As shown, with the guidance of modern sedimentary geology and petroleum geology, make full use of the Lower Paleozoic Ordovician Mawu 5 Reservoir drilling data, logging data, gas test data, etc., through the division and comparison of small layers, clearly 5 Stratigraphic distribution characteristics, compiled Ma 5 4 He Ma Wu 6 Contour map of stratum thickness, according to the principle of stratum deposition 5 Ancient topographic map at the time of deposition. Apply adjacent ...

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Abstract

The invention discloses a prediction method suitable for an ordovician Ma5-5 gas reservoir dolomite reservoir. The method is characterized by, on the basis of data analysis of applied geology, well drilling and logging and the like, carrying out thin layer division and contrast on ordovician carbonate formation, carrying out formation distribution, sedimentary microfacies, reservoir characteristics, dolomitization and dolomite genesis study, recovering a palaeotopographic map when Ma5-5 deposits, analyzing formation mechanism of Ma5-5 dolomite and realizing predication of the Ma5-5 dolomite, thereby improving drilling ratio of the Ma5-5 dolomite reservoir.

Description

Technical field [0001] The invention relates to the field of natural gas exploration and development, in particular to a 5 Prediction method of gas reservoir dolomite reservoir. Background technique [0002] At home and abroad, there is no mature ordovician Mawu in the Ordos Basin. 5 Prediction method for dolomite reservoir of lithologic gas reservoir. The existing methods are only for the evaluation and prediction methods of carbonate epigenetic karst weathering crust reservoirs in the Ordovician upper assemblage series in the Ordos Basin, etc. 5 There is no mature, accurate and operable prediction method for the distribution of dolomite reservoirs in gas reservoirs. [0003] At present, there are two prediction methods for carbonate reservoirs: one is to use seismic profiles or seismic attributes to predict carbonate reservoirs. Due to the influence of geomorphology and the limitation of seismic resolution, dolomite reservoir prediction is not It is accurate and the drilling suc...

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Application Information

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IPC IPC(8): G06Q10/04G06Q10/06G06Q50/02G01V9/00
CPCG01V9/00G06Q10/04G06Q10/0639G06Q50/02
Inventor 白慧张吉王龙李浮萍吴小宁冯敏张春阳王树慧黄丹
Owner PETROCHINA CO LTD
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