30results about How to "Improve the interpretation rate" patented technology

The invention relates to a method for recognizing a light oil reservoir and a gas condensate reservoir in a stratum and application. The method comprises the steps that firstly, a testing well is obtained, gas compositions of different depth positions in the testing well are measured, and comprise C1, C2, C3, iC4, nC4 and the percentage composition of optional iC5 and nC5 in all positions; secondly, the measuring values of the gas compositions are subject to normalization processing, and the relative contents of the gas compositions are calculated; thirdly, according to the relative content distribution data obtained through the normalization processing in the second step, a curve graph is made; fourthly, in the curve graph in the third step, a gas curve is built; fifthly, according to the contrast relation of the relative content distribution data curve and the gas curve of the compositions of gas logging of each position, the light oil reservoir and the gas condensate reservoir in the stratum are recognized. Through the method, the light oil reservoir and the gas condensate reservoir in the stratum can be effectively recognized, and the interpretation coincidence rate of the hydrocarbon reservoir can be improved.

The invention provides a method and device for evaluating reservoir cap association welllogging, wherein the method comprises the following steps of: determining breakthrough pressure of a target shale cover layer according to the porosity of the target shale cover layer, and acquiring at least one auxiliary classification index corresponding to the target shale cover layer; determining the type of the target shale cover layer in a preset cover layer type library based on the breakthrough pressure and the auxiliary classification index of the target shale cover layer, wherein the cover layer type library is used for storing the corresponding relationship between each type of the cover layer and the breakthrough pressure and the auxiliary classification index; and combining the type of thetarget shale cover layer with a known evaluation result of the target reservoir covered by the target shale cover layer to obtain a comprehensive evaluation result aiming at the target reservoir. Theperformance classification of the shale cover layer can be accurately and effectively obtained, the storage conditions of the oil and gas reservoirs and the sealing performance of the oil and gas reservoirs can be combined with reservoir evaluation, the interpretation coincidence rate of welllogging evaluation can be effectively improved, and the accuracy of welllogging evaluation can be improved.

The invention relates to a method for determining a calcareous interbed and formation porosity by neutron lifetime and compensated neutron combination logging, which comprises the following steps: adopting mudstone counting rate to respectively standardize the counting rate of a compensated neutron logging far detector and the capturing counting rate of a neutron lifetime logging far detector; defining DSFC divided by TMFC as the index curve CAI of the calcareous interbed, wherein the obvious peak of the CAI curve indicates the calcareous interbed; and utilizing the ratio of the counting rateof the compensated neutron logging far detector and the capturing counting rate of the neutron lifetime logging far detector to be linearly fit with the total porosity determined by neutron-density logging, obtaining the total porosity Phi t of a gas zone, and obtaining the effective porosity Phi of the gas zone after shale correction. The invention provides the method for determining the calcareous interbed and the formation porosity by neutron lifetime and compensated neutron combination logging, and the method improves the interpretation coincidence rate and the reserves calculation accuracy of a superficial layer gas zone of a testing block.

The invention discloses a method and device for oil and gas-bearing mud logging interpretation of reservoirs. The method includes: establishing a mud logging interpretation database; extracting effective parameters from the mud logging interpretation database, and performing parameter Reconstructing to obtain the reservoir gas logging surface oil and gas index and the reservoir engineering parameter logging physical index; the reservoir gas logging surface oil and gas index and the reservoir engineering parameter Mud logging physical property index intersects to establish mud logging interpretation chart. The invention realizes the purpose of improving the coincidence rate of mud logging interpretation.

The invention discloses a method for identifying a low-permeability gas water layer while drilling. The steps are: S1, calculating the movable gas saturation; S2, determining the T of formation water 2 Cutoff value, calculate the movable water saturation and irreducible water saturation; S3, calculate the movable air-water ratio index; S4, take the movable air-water ratio index as the ordinate, and the irreducible water saturation as the abscissa, establish an explanation chart; S5 1. Project the irreducible water saturation and the movable air-water ratio index of the layer to be explained onto the interpretation chart, and perform interpretation according to the interpretation area where the landing point is located. The method of the invention effectively solves the difficult problem of identifying tight gas reservoirs while drilling, and has the advantages of simple operation, low cost, accurate interpretation and wide application prospect.

The invention relates to a well site data integration cooperative work platform that comprises a data acquisition module, a central database and an engineering technology cooperative work platform. The engineering technology cooperative work platform comprises a query display module, a geological comprehensive research module, a while-drilling dynamic tracking and analysis module, a knowledge base management module, a mobile monitoring module and a remote decision support module. The well site data integration cooperative work platform builds a standardized and unified big data management platform, achieves production site information comprehensive application, achieves well site and base field data synchronization analysis application, eliminates information isolated island, provides an integrated cooperative work platform for drilling engineers, geologists, reservoir engineers and managers, fully shares information, makes decisions more intuitively and rapidly, guides field operation in real time, improves the efficiency and quality of well site operation management, and brings the reformation of production management modes.

The invention relates to a logging oil and gas interpretation discrimination method based on thermal evaporation hydrocarbon gas chromatography spectra comparison. The method comprises the following steps: establishing a thermal evaporation hydrocarbon gas chromatography standard map database at each preset layer of a completed well of a drilling area; extracting characteristic map data of a layerto be interpreted of an uncompleted well of the drilling area; and respectively calculating a similarity distance between the characteristic map data of the layer to be interpreted and each group ofthermal evaporation hydrocarbon gas chromatography standard map data with the same layer in the thermal evaporation hydrocarbon gas chromatography standard map database, wherein oil quality information and test conclusion information included in the thermal evaporation hydrocarbon gas chromatography standard map data with the smallest similarity distance in the corresponding layer in the thermal evaporation hydrocarbon gas chromatography standard map database serve as an oil quality conclusion and a fluid type conclusion of the corresponding layer to be interpreted. The logging oil and gas interpretation discrimination method based on the thermal evaporation hydrocarbon gas chromatography spectra comparison provided by the invention can improve the interpretation coincidence rate of a logging oil and gas water layer, and realize rapid identification of well sites and quantitative evaluation of oil and gas water layers.