... algorithms that identified unexpected pressure increases followed by sharp pressure drops. shale gas casing design artificial intelligence machine learning hydraulic fracturing upstream oil & gas pressure drop operation casing and cementing pressure behavior prediction algorithm...

... of a basis functions. For single-well pressure behavior, ridge regression often struggles with high-frequency measurements that contain multistage responses. An impulse response might share similar functional characteristics, for example wellbore storage and pseudosteady state are both linear responses...

..., OLGA, results. Balino et al . (2010) studied severe slugging characteristics in pipeline – catenary riser systems. A model was developed to predict the transient pressure behavior during severe slugging in such systems. A drift flux formulation was adopted in the riser and the method...

... fractures as well as complex hydraulic fractures in unconventional plays. hydraulic fracturing Upstream Oil & Gas hydraulic fracture network pressure behavior fractured well fracture segment fracture Drillstem Testing pressure transient analysis natural fracture spe annual technical...

... heterogeneous reservoir Drillstem Testing Fluid Dynamics reflection diffusivity equation pressure derivative reservoir unconventional reservoir permeability flow in porous media drillstem/well testing pressure behavior boundary variable technique society of petroleum engineers reservoir...

... compressibility: Drillstem Testing flow period reservoir pressure reproduce pressure transient testing pressure data drawdown response sequence pressure transient analysis drillstem/well testing pressure behavior boundary pressure buildup derivative plot test data reservoir buildup pbu 2...

... periods may be present. Strange pressure behavior during a transient may lead to large uncertainties in parameter estimation or even wrong interpretation. In order to correct this, some sections of the data need to be removed before interpretation. PDG data analysis requires a procedure to interpret...

... of the pressure transient behavior hidden in the test data by well rate variation during a test. Integration of these several views into one consistent picture allows one to recognize, understand, and explain the main features of the test transient pressure behavior. Recently, a new method of analyzing test data...

... parameters describing the pressure behavior of the reservoir under consideration and the role that they play on the pressure response of a well are discussed. Conditions under which the nested-triple porosity character of a reservoir could be established are documented. A procedure to characterize triple...

... data. We demonstrate application of the pressure-rate deconvolution analysis to several real test examples. sequence algorithm reservoir pressure pressure behavior vector test sequence deconvolution rate data upstream oil & gas pressure-rate deconvolution constraint pressure data...

... approximately 2032 gal of 4% KCl (wellbore fluid) was pumped into the formation. Afterward, the pressure behavior of both gauges are approximately parallel, confirming formation breakdown and subsequent communication between the two zones. The breakdown pressure from the upper gauge was 7790 psi. At the time...

... Reservoir appraisal usually requires a test sequence that includes several injection and falloff periods. Interpretation of transient pressure behavior for such test sequence requires accurate analytical solution of the two-phase water injection problem with a general form of the injection rate...

... pipeline-riser system injection elimination operation new technique gas injection riser base sarica pressure behavior pipeline entry location liquid length prediction production monitoring conference fluctuation sl 0 slug catcher production control location reduction reservoir...

... Abstract The effects of natural fissure opening, or pressure dependent leakoff, on the pressure behavior observed during fracturing are significant. Previous work has suggested that this behavior can be identified from pressure diagnostic plots during pumping, or from pressure falloff analysis...

... events. We observed a peculiar pressure behavior: a clear breakdown occurred at low flow rate, but at higher flow rate the pressure kept rising until we reached the pressure limit. During the later injection stages, a large number of triggered seismic events occurred. The events mostly came from faults...

... Abstract A new technique was developed to model capillary pressure behavior from wireline log data and applied to carbonate reservoir rock from a Saudi Aramco field. The method utilizes image analysis of petrographic thin sections, capillary pressure measurements, and neural network analysis...

... conductivity horizontal well pressure transient analysis straight line hydraulic fracturing drillstem/well testing drillstem testing fracture pseudoradial flow period transverse fracture pressure transient testing dimensionless fracture conductivity pressure behavior logarithm multifractured...

... ABSTRACT This paper investigates the transient pressure behavior of selectively completed horizontal wells. A new solution in Laplace space is presented and asymptotic approximations are derived. Computational issues are also addressed. Flow characteristics of sectionally completed horizontal...

... is to investigate the effect of wellbore hydraulics on the pressure behavior and productivity of horizontal gas-wells. The semi-analytical model used to investigate the effect of wellbore hydraulics, couples gas flow in the reservoir and in the wellbore by utilizing the real gas-pseudopressure function. Pressure...

... The interpretation of the transient pressure behavior of moderate and high conductivity fractures using models that neglect the fracture storage effects may result in an overestimation of the fracture conductivity and an underestimation of the fracture half-length. As illustrated by the comparisons presented...