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

The invention relates to a log multi-parameter oil-gas layer interpretation and evaluation method based on a radar map and a cloud model. The method comprises the steps of: obtaining interpretation and evaluation parameters by normal geological log, gas log, geochemical log, nuclear magnetic log and the like; integrating log interpretation databases; drawing the log multi-parameter oil-gas interpretation radar map according to different reservoir types in different areas by using the databases; and mapping the interpretation parameters onto the rays of the radar map. The radar map is divided into a good reservoir, a medium reservoir and a poor reservoir from inside to outside; the area of the radar map is taken as the characteristic quantity for finishing characteristic extraction; the area of the radar map is used to calculate a cloud boundary equation, and the cloud boundary equation is mapped on the manufactured cloud scale; the cloud model is the same as the radar map, namely the reservoir is divided into a dry layer area, a low-yield oil-gas layer area and an oil-gas layer area with industrial value from inside to outside. The intuitional and quantitative interpretation and evaluation of log multi-parameter oil-gas reservoirs is realized by the radar map and the cloud model. The interpretation coincidence rate can be increased, and the interpretation conclusion is represented by a graph, so that the log multi-parameter oil-gas layer interpretation and evaluation method is intuitional in expression and strong in applicability.

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 discloses a method for recognizing reservoir fluid properties based on grey correlation analysis. The method includes the following steps of 1, collecting the six parameter values of gasometry, themolysis, quantitative fluorescence, porosity, permeability and interval transit time of a stratum to be analyzed and stratums with oil test conclusions, wherein the stratum to be analyzed and the stratums with oil test conclusions belong to the same oil and gas reservoir; 2, conducting dimensionless processing on the six parameters; 3, calculating the correlation degree; 4, calculating the weight coefficient of each parameter; 5, conducting weighted summation on three parameters of gasometry, themolysis and quantitative fluorescence of each stratum to obtain the oil and gas abundance index of the stratum, and conducting calculation on the other three parameters to obtain the physical property index; 6, drawing an interpretation chart with the two indexes, and marking areas; 7, calculating the oil and gas abundance index and the physical property index of the stratum to be analyzed, and drawing dots in the interpretation chart, wherein the areas corresponding to the dots represent reservoir fluid properties. According to the method, the reservoir fluid properties are comprehensively evaluated with multiple parameters, so that the limitation and multiplicity of solutions of a single-parameter evaluation method are avoided, and the logging oil-gas-water layer interpretation coincidence rate is increased.

The invention discloses a method for rapidly evaluating an oil-water layer through array induction data, and belongs to the technical field of logging evaluation in oil exploration. The method comprises the steps of collecting single well array induction logging data, namely carrying out array induction logging, analyzing the array induction data, selecting a curve which reflects the undistributed stratum electrical resistivity and the flushed zone stratum electrical resistivity, evaluating stratum water characteristics on the whole well section through the provided method according to the selected curve, segmenting the processed well section according to the calculated stratum water characteristic values, determining the stratum water characteristic values of each section, evaluating the water saturation of a whole-well-section reservoir stratum through a formula according to the selected stratum water characteristic values of each well section, calculating and obtaining the water saturation value of each storage stratum single layer or each point, evaluating the oil-water layer with an evaluation standard according to the water saturation values of each layer of the storage stratum, and therefore achieving rapid recognition on the oil-water layer.

The invention relates to the oil-gas geological field, in particular to the analysis on rock core for well drilling and prospection. First, a rock core sample is crushed and placed into a test cylinder, soaked by some de-ionized water, the concentration of Cl ion in the leaching liquid is determined, then the water saturation of the rock core is calculated by a formula. The invention is easy to operate, rapid to analyze, can meet the requirement for rapid analysis on water saturation at the drilling and prospecting site, and is of important meaning for in-situ rapid identifying and evaluating oil-gas layer, improving the compliance in explanation of oil-gas water layer. The invention is for prospecting oil and gas fields.

The invention relates to a rock core water-bearing analysis method, in particular to an analysis of drilling well exploration rock core, belonging to oil gas geological technical field. The method comprises that breaking a rock core sample to be arranged into a test barrel, adding deionized water into the test barrel to submerge the rock core sample, sealing the test barrel, immerging the sample at normal temperature, using a test machine to find the mineralization rate K of the immerge liquid. The invention uses conductivity detect technique, to simplify the analysis process via rock core water-bearing saturation analysis processes and calculation equation, to quickly obtain the water-bearing saturation via little devices, while the chemical agent has reduced consumption, non toxicity, non damage on operation, non special protection demand, and non environment pollution. And the invention has quick analysis, with only one device, simple calculation, non special demand on operation and worker, and the application for rock core water-bearing quick analysis at drilling site.

The invention discloses an interpretation and evaluation method for water layer recognition by a logging while drilling Q parameter. The method comprises the following steps of: a, collecting and sorting target layer logging engineering parameters and geological parameters; b, using the logging engineering parameters and the geological parameters to calculate a logging Q parameter response value; c, drawing a diagram according to the logging Q parameter response value; and d, using a discriminating chart to realize water layer development condition recognition while drilling. The interpretation and evaluation method has the beneficial effects that the advantages of timeliness, high efficiency, realness and high speed of the logging hydrocarbon value parameter while drilling interpretation are realized; and the logging engineering and geological parameters are integrally used for realizing the water layer development condition recognition while drilling.

The invention provides a judgment method for an oil-water layer. The judgment method comprises the following steps of: I. defining an oil-gas display layer according to the information of rock debris, rock cores, sidewall coring and gas logging; II. Analyzing samples, to obtain the relative percentage composition of C8-C37 n=alkanes, Pr and Ph; III. Calculating the ratio of Pr/C17, Ph/C18, delta C21-/delta C22+, C21+C22/C28_C29 parameters; IV. drawing a parameter ratio broken link graph; and V. determining the reservoir fluid property according to the positions of shaft plumpings of a Pr/C17, Ph/C18, delta C21-/delta C22+, C21+C22/C28_C29 on a rock pyrolysis gas chromatorgraphic parameter drawing board. According to the judgment method, the parameter application range can be extended, the change condition of longitudinal fluid property of reservoir can be objectively reflected, and the interpretation coincidence rate of the logging oil-water layer can be increased.

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 the field of petroleum well logging, in particular to a well logging quantitative interpretation method based on a fast chromatographic analyzer, which is characterized by at least comprising the following steps of: (1) extracting samples; (2) outputting volume percentage parameters of sample de-aerated gas by the fast chromatographic analyzer; (3) submitting the data of the fast chromatographic analyzer (7) to a processing unit for processing; (4) classifying each well obtained by a sampling well drilling system according to the performance of oil contained in the stratum layer by layer; (5) storing the parameters calculated at the step (3) and the stratum contained oil classifying layers obtained at the step (4) in the same layer, finding out common options of each stratum contained oil classifying layer distributed in all sampling drilled wells and corresponding layer analyzing parameters, solving the minimum of the common options of all sampling drilled wells as threshold; (6) marking the obtained stratum contained oil classification of the sampling drilled wells in the whole drilled well region in a form of a geographic information chart; and (7) searching the working key points of the whole drilled well region with the geographic information chart. The invention realizes fast spectrum evaluation and quantization, solves the problems that the traditional interpretation has low coincidence rate and large difficulty and can not be quantitatively interpreted, and provides more reliable technical support for the interpretation and the evaluation of the reservoir property.

The invention discloses a logging hydrocarbon reservoir interpretation method for calculating the comprehensive water content of a reservoir by utilizing multiple parameters. The method comprises thefollowing steps of adopting geology, gas logging and geochemical data obtained by on-site logging to make data quality analysis, quantifying by combining regional characteristics and influence factors, and calculating the comprehensive water content of the reservoir by considering explanation weight coefficients of single technology in a work area, gaseous and liquid hydrocarbon abundance indexesunder different oil quality conditions, total hydrocarbon values, Pg values and the like of typical water layers in the same layer group or the same oil-water system. The comprehensive water contentof the reservoir is calculated as a quantitative parameter, and the water content of the reservoir can be analyzed by utilizing the parameter, so that the oil-gas condition of the reservoir is quantitatively evaluated. The method highlights the comparison relationship between the water layer and the reservoir, and can quantitatively evaluate the comprehensive oil and gas containing condition of the reservoir. In the using process, the interpretation coincidence rate of well logging is increased, applicability is high, and the method can be used and popularized as a novel well logging hydrocarbon reservoir interpretation method.

The invention discloses a method for identifying a low-permeability gas-water layer while drilling. The method comprises the following steps: S1, calculating movable gas saturation; S2, determining aT2 cut-off value of formation water, and calculating movable water saturation and irreducible water saturation; S3, calculating a movable gas-water ratio index; S4, establishing an interpretation chart by taking the movable gas-water ratio index as a vertical coordinate and the irreducible water saturation as a horizontal coordinate; and S5, projecting the irreducible water saturation and the movable gas-water ratio index of a layer to be interpreted onto the interpretation chart, and interpreting according to an interpretation region where a drop point is positioned. According to the method,the problem of identification while drilling of a tight gas reservoir is effectively solved; and the method is easy to operate, low in cost, accurate in interpretation and wide in application prospect.

The invention discloses a formation fluid separation analysis and evaluation method. The method includes the following steps of firstly, conducting three-phase separation; secondly, conducting hydrocarbon gas collection and analysis; thirdly, conducting debris data collection and analysis; fourthly, conducting comprehensive interpretation and evaluation. By means of the method, effective separation of hydrocarbon gas, drilling fluid and carried debris is achieved, and by conducting expansion analysis on components of the hydrocarbon gas, the drilling fluid and the carried debris, more accurate and timely analysis and interpretation are achieved, and the coincidence rate of interpretation conducted on hydrocarbon reservoir by logging is increased; rapid type recognition and comprehensive and quantitative evaluation of reservoir fluid are achieved, and foundation is provided for subsequent logging, testing, comprehensive researching and other exploration and development decisions.

The invention provides a logging identification method for a low-salinity-cause low-resistivity oil reservoir. The method comprises the following steps of obtaining fluorescent logging data information and performing quantitative processing on the information to obtain quantitative assignment of fluorescent logging parameters; calculating a reservoir section oil and gas display index F by using the obtained quantitative assignment; gas logging data being obtained, and the total hydrocarbon anomaly coefficient Kg of the reservoir section being calculated; drilling-time logging data being obtained, and a drilling-time abnormal coefficient Kd of the corresponding reservoir section being calculated; calculating an oil and gas anomaly index Z of a front reservoir section; obtaining oil-tested reservoir section data and establishing a Z-F intersection chart; based on the established Z-F intersection chart, determining a reservoir fluid property interpretation standard; and identifying a low-salinity-cause low-resistivity oil layer, and explaining fluid properties of a target layer. According to the method, quantitative processing of conventional fluorescence qualitative data is realized through a standard geological experience assignment method; and quantitative application of conventional fluorescence logging data is realized through calculation of the oil and gas display index F.