363 results about "Well test" patented technology

Automated monitoring and management of well tests of hydrocarbon wells in a production field. Routing of the output of a well to a flow meter, separated from the output from other wells in the field, is detected by a computer system such as a server. Measurement data including the flow as measured by the flow meter, and also other measurements such as temperatures and pressures contemporaneous with the flow meter measurements, are acquired by the computer system; a stable period is identified, over which the flow test measurement data are considered valid. Upon completion of a specified duration or upon a change in the flow environment, the computer system notifies the user of the completion of the flow test. The flow test results can be used to modify predictive well models, with the modification dependent on validation by the user. The system can also plan and schedule future flow tests.

A method and system for well test optimization provides test parameters and variation range therefor, independently from preliminarily reservoir and downhole fluid data; and repeatedly executes the test for each parameter to obtain real-time measured data, and interpreted data that is compared to the variation range for meeting a test objective. A method and system for well test design and interpretation, includes a testing manager having testing hardware/gauge metrology; a geological model; dynamic/static engineering data acquisition; and a reservoir model generator. A method and system for well test design and interpretation generates a test plan and an initial reservoir model and data from real/near-real-time, surface/downhole/manual data, aggregated data based on quality control/assurance, and optimization data based thereon and simulated downhole data; models/interprets the optimization data to meet test objectives for terminating/continuing the test plan; modifies the optimization; and/or generates reports from the modeling/interpretation when terminating the test plan.

Method for optimizing the development of an underground reservoir, wherein a geological model is updated using dynamic data and well tests.

A reservoir model is constructed by performing a geological model scale change. Dynamic data are simulated from this reservoir model. Influence zones are identified within the geological model where the well tests induce a pressure variation during well testing. Well tests are then simulated for each influence zone. An objective function measuring the difference between the simulated data and the measured data is calculated. The geological model is then modified so as to reduce to the maximum the objective function using a geostatistical parametrizing technique. Finally, development of the underground reservoir is optimized by evaluating, by means of a flow simulator, the reservoir production for various production schemes.

Application: notably oil reservoir development.

The invention provides a well test analysis control system for a low permeability gas reservoir and a method thereof. The method comprises the following steps: measuring bottom hole pressure value of a gas well in a period after well startup to obtain a relation value between pressure difference and time; judging whether the relation value equals a preset relation value, if yes, performing the next step, or correcting well test interpretation parameters corresponding to the preset relation value; taking the well test interpretation parameters corresponding to the preset relation value as the well test interpretation parameters of the gas well; analyzing gas permeation situation of the gas well according to the well test interpretation parameters so as to control exploitation of the well gas; wherein, the well test interpretation parameters comprise gas slip factor, low level permeability, skin factor, well bore storage coefficient, flow coefficient and formation pressure. The well testinterpretation according to the method perfectly accords with actual condition of the gas reservoirs, accurately describe the gas reservoirs, and provide a reference for determining production system.

Systems and methods for diagnosing production problems in oil field operations are provided. A first video monitor displays an oil field diagnosis process flow chart that includes selectable objects such as Review Well Test Differences, Review Sliders, Review Bad Actors, and Perform Steam Flood Performance Check. Each selectable object is associated with one or more incompatible domain-specific software applications. One or more of the selectable objects are selected and one or more additional video monitors display reports extracted by a middle-ware software code segment layer from the associated domain-specific software applications. Oil wells having production problems are listed and problem oil wells are displayed on an oil field map. Any commonalities among the displayed problem oil wells indicative of a common cause of the production problems are visually identified. Work is scheduled in the associated domain-specific software applications sufficient to remedy the common cause.

A method for calculating a property of a formation using one or more sensors lowered into a well on coiled tubing and surface well testing equipment that includes recording flow rate data using the surface well testing equipment; recording downhole pressure data using the one or more sensors lowered into a wellbore penetrating the formation on coiled tubing; transmitting the flow rate and downhole pressure measurements to a server, wherein the server is capable of collecting, storing and retransmitting the measurements; and transmitting the measurements to a processing unit, wherein the processing unit analyzes the measurements and calculates a property of the formation. Also an apparatus for calculating a property of a formation that includes a coiled tubing unit having one or more sensors capable of being lowered into a wellbore and measuring downhole pressures; surface well testing equipment capable of measuring flow rate data; means for transmitting the downhole pressure and flow rate measurements to a server capable of collecting, storing, and retransmitting the measurement data; and means for transmitting the measurements to a processing unit capable of calculating the property of the formation. A related method of servicing a hydrocarbon well is also disclosed.

The invention provides a tight gas fracturing horizontal well numerical value well testing model building and solving method. The method includes the following steps: step one, generating two-dimensional geologic body and a three-dimensional geologic body of a tight gas reservoir fracturing horizontal well; step two, performing grid discretization on the generated two-dimensional geologic body and the generate three-dimensional geologic body of the tight gas reservoir fracturing horizontal well; step three, calculating a pressure-difference-free seepage model of a horizontal well shaft; step four, building a coupling model, solving the built coupling model, and enabling acquired solutions to generate a well testing theoretical curve; step five, fitting the theoretical curve acquired in step four with a measured curve to acquire parameters of well testing explanation. The method has the advantages of high calculation speed, good curve fitting effect and accurate explanation result.

The well test system has a net oil computer NOC that captures and stores information from disparate well instrumentation devices, measures produced oil, water, and gas quantities based on the information and controls well processes based on the quantity measurements. The NOC includes operational software that collects instrumentation data from a plurality of wells. Configuration software downloads user programmable configuration information to the NOC, which enables the NOC to record data from a wide variety of flow devices, water test meters, or the like. User programmable alarms are included. A plurality of controllers can control processes associated with individual wells. A wireless communication system electronically sends data and test results to cell phones, radio devices, and the like. A daily test data log provides a historical database, which is analyzed to formulate “Data Confidence” information for each well. The net oil computer is operable with two-phase or three-phase separators.

A system and method for separating solids from return fluids in well drill-out, flow back, well-test, and other production operations. Solids are collected in a filter comprising a perforate inner tube inside a solid outer tube with an annulus therebetween. The fluid stream from the well enters the filter through the inner tube so that the solids are captured inside and the filtrate flows out through the annulus. The filtrate is passed though a flow back line to a flow back tank. As needed, the solids are removed from the inner tube into a debris tube without interrupting the fluid flow through the filter. Chokes are included for equalizing the pressure along the flow path as the debris is moved from the filter to the debris tube and from the debris tube into to a debris pit so that dramatic changes in pressure are avoided.

The invention discloses a method and a device for water drive oilfield advantage channel recognition. Unstable pressure restore well testing data are applied to recognize advantage channels formed during development of water drive oilfields. The method includes: step of setting a well testing typical characteristic curve layout, step of calculating well testing bottom pressure derivatives, step of drawing a testing well relation curve and step of judging existence and development level of the advantage channels, and the device comprises a typical characteristic curve layout setting module, a well bottom pressure measuring module, a well bottom pressure derivative calculation module, a testing well relation curve drawing module and a judging module. Compared with the prior art, the method for water drive oilfield advantage channel recognition is high in accuracy, high in generality, easy to implement, high in operability and capable of providing technical support for implementation of subsequent oilfield yield-increasing measures and designing of recovery ratio improving schemes.

A method for inferring production of a rod pumped well. Inferred production is estimated in a well manager which not only performs pump-off control with a down-hole pump card, but also estimates liquid (oil-water) and gas production using the subsurface pump as a meter. Methods are incorporated in the well manager for identifying and quantifying several conditions: pump leakage, unanchored tubing, free gas and oil shrinkage. Quantifying such conditions in the well manger enables accurate inferring of production thereby eliminating the need for traditional well tests.

The invention discloses a shale gas multi-stage fracturing horizontal well post-fracturing crack parameter evaluation method and system. The method comprises the following steps: 1) aiming at a targetshale gas field, collecting static geological parameters, dynamic data and pipe column parameters of a plurality of shale gas multi-stage fractured horizontal wells; 2) obtaining values of fracturingtransformation stratum coefficients of the plurality of wells; 3) obtaining a dynamic total reserve value of each well; 4) establishing an empirical relationship between the fracturing transformationstratum coefficient and the total geological reserve of the volume fracturing transformation area according to data obtained in the steps 2 and 3; 5) obtaining the total geological reserve of the volume fracturing reconstruction area; 6) calculating the half length of the effective support hydraulic fracture; and 7) performing gas well production history fitting and/or shut-in pressure recovery well test chart fitting based on the crack half-length constraint to obtain a fracturing transformation parameter evaluation result. According to the method, the problem of high historical fitting multiplicity can be solved, a more reliable fracturing transformation parameter interpretation result is obtained, and a basis is provided for predicting the gas well productivity and making a reasonabledevelopment technical policy in the next step.

Methods and apparatus are provided which permit well testing operations to be performed downhole in a subterranean well. In various described methods, fluids flowed from a formation during a test may be disposed of downhole by injecting the fluids into the formation from which they were produced, or by injecting the fluids into another formation. In several of the embodiments of the invention, apparatus utilized in the methods permit convenient retrieval of samples of the formation fluids and provide enhanced data acquisition for monitoring of the test and for evaluation of the formation fluids.

The invention provides a draw-down test analysis method for an underground shut-in water well with a low-permeability storage layer, and the method is applied to the technical field of oil well tests in oil fields. In the method, a base data analysis unit, a primary base feature analysis unit, a secondary main control factor analysis unit and a tertiary data analysis model unit are utilized, wherein the primary base feature analysis unit is used for utilizing the base data of the base data analysis unit to determine a geologic model for detection and analysis, judging the pressure propagation characteristic of the low-permeability storage layer and forming the superposition mode of bottomhole pressure drawdown in a drawn-down test; the secondary main control factor analysis unit is used for carrying out diagnostic analysis on the control degree of a geologic factor, a process factor and a dynamic factor on the pressure drawdown mode of the drawn-down test and determining main control factors according to the conclusion of the primary base feature analysis unit; and the tertiary data analysis model unit is used for selecting the draw-down test analysis method according to the conclusions of the primary base feature analysis unit and the secondary main control factor analysis unit and adopting different well test interpretation models according to the main control factors.

The present invention relates to a well test explanation method for cave volume calculation. The method comprises a first step of building a well test model according to a combination relationship of a crack, a cave and a wellbore of a seam type oil reservoir and measurement parameters of the crack, the cave and the wellbore; a second step of acquiring a real space bottomhole pressure solution according to the well test model; and a third step of fitting by using the real space bottomhole pressure solution and measured bottomhole pressure data so as to acquire parameters about crack permeability, a wellbore reservoir coefficient, a crack length, a crack cross-sectional area, and a cave volume. Through adoption of the well test explanation method for cave volume calculation, a corresponding well test explanation model is built according to different crack combination relationships, so that the volume of each cave is explained, further, the length and cross-sectional area of the crack or a seepage channel are obtained.

The invention provides a well test interpretation method of a vertical well for thickened oil thermal recovery. The method comprises: choosing a time varying well test model according to a thickened oil vertical well thermal recovery mode before a well test process; obtaining a real space solution of a bottom pseudopressure function with well storage according to the time varying well test model; and converting the real space solution of the bottom pseudopressure function with the well storage into a real space bottom hole pressure solution through converting the bottom pseudopressure function with the well storage from a temporal domain into a time domain. The temporal domain is a multi-dimensional space, and arguments of the temporal domain are time, pressure and temperature. The time domain is a one-dimensional space, and an argument of the time domain is time. The well test interpretation method is simple in computation structure, the problem that a thermal recovery well test mathematical model is different to solve accurately is solved, and accurate inversion of oil deposit dynamic parameters through the thermal recovery well test is achieved.

The invention is a method of evaluating a recovery potential for hydrocarbons contained in a fractured reservoir, using an enhanced recovery technique. Characteristic reservoir data, data obtained from well test results and data relative to the development conditions are acquired. A pressure gradient related to the flow of a fluid injected to improve recovery is then estimated from the previously acquired data. A recovery coefficient is calculated for the hydrocarbons initially in place in matrix blocks by estimating water saturation for a state of equilibrium of the matrix blocks. Finally, the oil recovery time under the effect of the fluid circulation in fractures is estimated by determining the required for the matrix blocks to change from the initial state to a state of equilibrium.

The invention relates to the technical field of agriculture and particularly relates to a platform device and a method for testing variable pesticide spraying by a remote control aircraft. A plurality of sprayers are arranged on a bracket unit of the testing platform device, a propeller with power is disposed above the sprayers, and pieces of testing paper and the sprayers are correspondingly arranged. According to the platform device and the method, uniformities, drifting laws and deposition laws of pesticide droplets are well tested and evaluated, spraying usage amount and spraying speeds of pesticides are effectively controlled, the operation is convenient, the measurement is accurate, waste of the pesticides is avoided, researches on different parameters of the remote control aircraft and influences of the parameters are facilitated, and the device and the method can be widely applied to relevant production researches in enterprises, scientific research institutions and colleges.

The invention relates to a well test analysis control system and method used for horizontal well subsection liquid producing identification. The method includes the following steps that a bottom hole pressure value of a horizontal well in the well shut-in period is measured, and the relation value between a pressure difference and time is obtained; whether the relation value is equal to a preset relation value or not is judged, if yes, the next step is performed, and if not, well test interpretation parameters corresponding to the preset relation value are corrected; the well test interpretation parameters corresponding to the preset relation value serve as well test interpretation parameters of the horizontal well; according to the well test interpretation parameters of the horizontal well, the liquid producing condition of the well is analyzed so that development of the horizontal well can be optimized; the well test interpretation parameters comprise the horizontal well liquid producing section number, the position of each liquid producing section, the length of each liquid producing section, the skin factor of each liquid producing segment, the permeability and a shaft storage coefficient. Horizontal well test interpretation performed through the method accords to the actual condition of an oil reservoir better, and an accurate basis is provided for liquid producing well section diagnosis and interpretation and well stimulation making of the horizontal well.

The invention discloses an integrated oil casing head. The integrated oil casing head comprises a carrier welded to the upper port of a conduit, the upper end of the carrier keeps contact with the body of a wellhead assembly through a clamping block, the inner cavity of the body is provided with three steps from bottom to top, namely technical casing hanger step, a pressure test step and an oil pipe hanger step, the body is provided with a flat head jackscrew, two groups of side drift diameter holes, a jackscrew and two pressure test holes in sequence from top to bottom along the radial direction, and the upper end of the body is connected with a christmas tree cover plate flange. Once the integrated oil casing head is installed, well drilling, well cementing and well testing well completion special operations such as underground pressure test, well cleaning, fracture acidizing and the like can be completed without replacing the wellhead assembly and changing ground facilities, therefore time and cost for lifting and placing drilling tools or tubing strings, replacing a wellhead and testing pressure can be reduced, and the risk caused by the absence of a blowout preventer assembly can be avoided during the replacement of the wellhead.

The invention belongs to the field of petroleum engineering, and particularly relates to an automatic hydrate preventing device for a deep water gas well test and a preventing method. The automatic hydrate preventing device for the deep water gas well test comprises an automatic data monitoring, acquisition and processing system and an automatic inhibitor control injection system, wherein the automatic data monitoring, acquisition and processing system lays the foundation for judgment of hydrate generation and correction by monitoring parameters of temperature, pressure, liquid flow, gas flow, liquid mineralization degree and gas component in real time; acquired data are processed, and a hydrate judgment result and an inhibitor adjusting result are given; and the automatic inhibitor control injection system rapidly sends a control signal according to the processing result of an upper computer, an executing mechanism is used for performing execution, the working parameters of an inhibitor injection pump are adjusted, and inhibitor injection is adjusted. According to the method and the device, the test condition can be automatically monitored in real time in the whole journey, the hydrate inhibitor injection speed is automatically controlled, and the automatic prevention purpose of hydrate is achieved.