41results about How to "Clear technical thinking" patented technology

The invention provides a quantitative evaluation method of a heavy oil steam stimulation water flooded layer. The quantitative evaluation method of the heavy oil steam stimulation water flooded layer comprises the following steps: step 1, determining resistivity of mixed formation water of the heavy soil stimulation water flooded layer according to analysis assay data or logging curve data of the formation water of the water flooded layer; step 2, calculating oil reservoir water saturation Sw according to rock resistivity of a coring well by using an archies formula on the basis of determining the resistivity of the mixed formation water of the heavy oil stimulation water flooded layer; step 3, calculating oil displacement efficiency eta of the water flooded layer according to the calculated oil reservoir water saturation Sw and oil-water relative permeability test data of the coring well; step 4, establishing a heavy oil stimulation water flooding degree judgment standard to realize quantitative judgment and recognition of the water flooding degree of the heavy oil stimulation. The quantitative evaluation method of the heavy oil steam stimulation water flooded layer has better operability, contributes to generalization, and provides a practical and feasible method for fine description of the heavy oil reservoir stimulation water flooded layer.

The invention provides a method for determining the productivity of new wells in an old area of an offshore oilfield based on multiple factors. The method includes the steps that the new well production effective thickness is designed; according to the residual oil saturation and the water content in production of corresponding layers of adjacent old wells in combination with the relation between the water content in the initial stage of production of new wells of an adjusted block and the water content of the surrounding old wells with similar oil reservoir conditions, the water content in the initial stage of production of the new wells of the block is determined; according to oil reservoir oil-water phase permeability data, the changing curve of the non-dimensional oil production index along with the water content is calculated, and the oil production index under the water content is calculated; the initial-stage production pressure difference of the new wells is determined; the theoretical daily oil productivity of the new wells is calculated; the relation between the actual yield and the theoretical calculated yield is summarized to determine the actual daily oil productivity in production of the new wells of the block. By means of the method for determining the productivity of the new wells in the old area of the offshore oilfield based on multiple factors, the purpose of improving the accuracy of prediction of the productivity of the new wells in the old area of the offshore oilfield is achieved, and meanwhile a basis is provided for offshore productivity planning and smooth new well drilling.

The invention provides a complex fault block oil reservoir vertical well deviated space homing prediction method comprising the following steps: S1, through fine stratigraphic correlation, reasonably dividing and comparing oil-containing small layers, and reasonably judging the oil-water relationship; S2, performing fine structure interpretation, compiling a top structure map and a fracture system development map, and judging whether there is well deviation in a place with abnormal fault form and structure trend; S3, compiling geological research maps based on the stratigraphic correlation result data and the seismic interpretation result; and S4, putting forward a reasonable vertical well deviated space homing prediction method according to a found drilled vertical well deviation problem. The complex fault block oil reservoir vertical well deviated space homing prediction method is clear in technical idea and simple in application, provides more detailed drilling data for 3D geological modeling, and lays a solid geological foundation for the development of later residual oil distribution research.

The invention provides a method for conducting reservoir property simulation through multi-direction variation function analysis. The method includes the steps that (1), sedimentary microfacies division is conducted according to the regional sedimentary feature; (2), partition is conducted in combination with the reservoir development direction on the basis of the sedimentary microfacies division; (3), variation functions with different phase bands are analyzed respectively for each partition; (4), simulation is conducted on property parameters, such as reservoir porosity and permeability on the basis of the accurate variation function adopting the mode of area dividing and phase belt dividing, and a property parameter model of a reservoir is obtained. By means of the method for conducting reservoir property simulation through multi-direction variation function analysis, the problems that in the process of reservoir property simulation, the meandering river sedimentary sand body is varied and the variation functions are simplex are solved, and a feasible method is provided for fluvial facies reservoir modeling.

The invention provides a full-scale optical fiber monitoring technology for a multilayer medium of a road structure and belongs to the technical field of intelligent structure health monitoring. The full-scale optical fiber monitoring technology is characterized in that a distributed optical fiber etched with fiber grating locally is arranged along the multilayer medium of a road structure in a full scale way at a radian with a bent radius not less than 2cm and is used as a sensing element for monitoring the multilayer medium of the road structure with local high precision and full-scale higher precision. The full-scale optical fiber monitoring technology has the advantages that the effects of local high-precision test and full-scale higher precision test can be achieved and the real-time monitoring and long-term health monitoring for the road structure can be realized. Besides, the monitoring technology has distinct thought, the method is feasible, and an integrated system is low in cost; and the monitoring technology is easily applied to the field of health monitoring for the road structure so that the road structure can be used more reasonably and efficiently.

The invention provides an irregular oil-water interface modeling implementation method. The method comprises the following steps: preliminarily simulating the space distribution of an oil-water interface of an oil-containing area; determining the fluctuation range of the oil-water interface according to the deepest and shallowest oil-water interface depths meeting during single-well drilling, and constraining the result of the last step by taking the oil-water interface fluctuation range as constrained control; determining a water-top interface of a pure water area according to the top surface structure of water sand; merging the oil-water interface of the oil-containing area and the interface of the pure water area to finally obtain an irregular oil-water interface of the whole area. According to the irregular oil-water interface modeling implementation method, the maximum coincidence between the oil-water interface of a well point and actual drilling is realized, the phenomenon that water exists in oil and oil exists in water appears on a single well when a unified oil-water interface is adopted is avoided; in addition, the irregular oil-water interface modeling implementation method is clear in technical concept and simple to operate, breaks through a method of a previous single oil-water interface and solves the problem that the irregular oil-water interface is not easily realized in a model.

The invention provides a new method for dividing water injection layer sections of an offshore water injection well. The new method for dividing the water injection layer sections of the offshore water injection well includes the following steps: a step 1, comprehensively considering the permeability gradational difference, the thickness gradational difference, the number of small layers in each layer, the water logging degree of each layer and the pressure difference so as to determine a water injection well layered injection boundary standard through a numerical simulation method; a step 2, counting the number of layers, the sand thickness, the permeability, the water logging degree and pressure distribution of an injection opened layer position of an existing layer section of the water injection well, and calculating the thickness gradational difference and the permeability gradational difference of each water injection layer section; a step 3, performing layer section primary division on the water injection well according to the layered injection boundary standard; and a step 4, considering the water injection process, performing suitable adjustment, and acquiring a final division result. The new method for dividing the water injection layer sections of the offshore water injection well is clear in thinking , is simple to apply, is feasible in offshore and similar oil reservoir water injection well layer section division.

The invention provides a method for correcting the oil saturation based on a liquid drainage phenomenon through the oil-liquid ratio of a rock core sidewall, and the method comprises the steps: 1, determining a coring well, the data of which needs to be processed according to the production data of an oil field, or confirming that an adjacent well is put into production, wherein there is oil production and liquid production data; 2, carrying out the porosity compression correction of the rock core saturation, and obtaining the rock core oil saturation and water saturation after initial correction; 3, obtaining the proportion of initial discharged liquid crude oil through the solving of the original oil-liquid ratio; 4, obtaining the corrected oil saturation through the rock core oil saturation and water saturation after initial correction at step 2 and the original oil-liquid ratio obtained at a coring moment at step 3. The method provided by the invention is better in operability, isinnovative and practical, is easy for popularization, and provides a new feasible method for the correction of the oil saturation of the rock core.

The invention provides a method for quantitatively evaluating an offshore oil pool water injection development effect through the tracer agent technology. The method comprises the steps that different tracer agents are added into different water wells in corresponding research well sets or corresponding research units in an oil pool numerical simulation model; the types of tracer agents produced by adjacent oil wells on the peripheries of all the water wells and the magnitude of the output quantity of the tracer agents are counted; the sources of the oil well tracer agents are determined according to the water injection wells; the communication effect situation of planes among oil-water wells is judged according to the magnitude of the output quantity of the tracer agents of all the oil wells and the types of the tracer agents, and whether equilibrium displacement of the planes is achieved or not is judged; the output types of tracer agents among oil well layers and the magnitude of the output quantity of the tracer agents are counted so that the corresponding displacement situations among longitudinal layers of the oil-water wells can be reflected; and whether equilibrium displacement of oil pool water injection development is achieved or not is evaluated. According to the method for quantitatively evaluating the offshore oil pool water injection development effect through the tracer agent technology, the problems that offshore oil pools are large in investment, difficult to operate and the like are achieved; the spot actual application cost of the tracer agents is greatly reduced; the offshore oil pool water injection development effect is rapidly evaluated; and the purpose of providing a dynamic allocation basis for a mine is achieved.

The invention provides a method for correcting core oil saturation by using a well logging resultant curve. The method comprises the following steps that a So-depth diagram is drawn according to firstmodified core oil saturation data So; according to a fitting formula of the oil saturation of a work area, a well logging resultant curve Sy is obtained, and a new well logging curve Sy' is obtainedthrough equal scaling and translation of the well logging resultant curve Sy; the core oil saturation data So is horizontally projected to the new well logging curve Sy' to obtain new oil saturation data So'; and an average value So'' of the data point So before projection and the data point So' after projection is taken as the final core oil saturation of which the relative size is corrected. According to the method for correcting the core oil saturation by using the well logging resultant curve, underground undisturbed stratum data is adopted to correct core experimental data which is takento the earth surface, so that real situations of an underground undisturbed core and a stratum are realized as faithful as possible, understanding is easy, the method is simple and convenient, and thefeasible method for correcting and improving the relative size of the core oil saturation is provided.

The invention provides a numerical simulation method considering nitrogen injection. The numerical simulation method considering nitrogen injection comprises the steps that 1, a three-phase three-component model is established; 2, an underground viscosity-temperature relation and an out-phase equilibrium constant are determined; 3, the relation between heat conductivity coefficients and nitrogen concentrations is determined, and a numerical reservoir simulation model is established; 4, a production history and a calculation result of the numerical simulation model are utilized for fitting; and5, different nitrogen injection volumes are defined, the calculation result is optimized, and a reasonable nitrogen injection volume is determined. The numerical simulation method considering nitrogen injection is clear in technical thinking and easy to apply, has creativity and practicability, is beneficial for popularization and has important guidance significance for guiding field implementation and realizing economical and effective development of a shallow and thin layer.

The invention discloses a rapid self-operated mixing device and a rapid self-operated mixing method. The rapid self-operated mixing device comprises a first barrel, a second barrel, a third barrel, apartition board, a power transmission mechanism, a power device, a water pressure difference acquisition unit and a controller, wherein the third barrel is coaxially mounted inside the first barrel; the second barrel runs through the first barrel and is connected with the inner cavity of the third barrel; small holes are distributed in the surface of the third barrel; the partition board is connected into the third barrel in a sliding manner; the power transmission mechanism is arranged inside the first barrel and the third barrel; one end of the power transmission mechanism is connected to the partition board, and the other end of the power transmission mechanism runs out of the first barrel and is connected to the power device arranged outside the first barrel; the water pressure difference acquisition unit is used for acquiring a water pressure difference deltaP value between the interiors of the first barrel and the third barrel; a deltaP value signal is transmitted to the controller. Rapid self-operated mixing of a fluid in a water mixing device in a low-flow and low-flow rate state, especially in a laminar flow state is achieved, parameters after mixing can be guaranteed to be quickly detected and fed back, and precise and timely adjustment of a mixing system is facilitated.

The invention provides a fluvial facies sand body inter-well plane connectivity quantitative evaluation method, which comprises the following steps of: 1, identifying and dividing a single river channel sand body, and establishing a well pair sample detailed data table; 2, five key parameters closely related to the connectivity are set, and five key parameters of the well pair are calculated; 3, carrying out data processing and weight calculation on the five key parameters of the well pair; and 4, calculating an inter-well connectivity quantitative evaluation parameter M, and carrying out fluvial facies sand body inter-well plane connectivity quantitative evaluation. Compared with the prior art, the fluvial facies sand body inter-well plane connectivity quantitative evaluation method has better operability, has innovativeness and practicability, is beneficial to popularization, and provides a simple, rapid and feasible method for inter-well plane connectivity quantitative evaluation.

The invention provides a culture medium additive for inducing taxol cells to produce 10-deacetylation baccatin III. The additive is prepared from sodium molybdate, colchicine, histidine, apigenin, peptone, yeast powder, fructus forsythiae, abrus cantoniensis hance, hyacinth bean coats, aizoon stonecrop herb and the like. The autophage mode of taxol cells is interfered with through the mode of adding inductors to a culture medium, and therefore taxol cells can be induced to secrete the docetaxel semisynthesis precursor 10-deacetylation baccatin III in a directed mode. It is found through experiments that after the additive is added to cell culture fluid, the 10-deacetylation baccatin III secretion amount of taxol cells is remarkably increased; meanwhile, the cell culture density can be increased to a certain degree. The culture medium additive is clear in thought, the technical scheme is reasonable, and good large-scale application prospects are achieved.