Using Pulsed Neutron Decay-Spectrum Data and Multi-inflatable Packer Plugdown Assemblies Improve Oil Production Rates in a Mature CO2 Flood

1996 ◽  
Author(s):  
B.D. Schneider ◽  
G.P. Hogan ◽  
W.N. Holt
Keyword(s):  
Oil Production ◽  
Neutron Decay ◽  
Production Rates ◽  
Decay Spectrum ◽  
Pulsed Neutron ◽  
Spectrum Data

scholarly journals Physical Scaling of Oil Production Rates and Ultimate Recovery from All Horizontal Wells in the Bakken Shale

Energies ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 2052 ◽  
Author(s):  
Wardana Saputra ◽  
Wissem Kirati ◽  
Tadeusz Patzek
Keyword(s):  
Petroleum Industry ◽  
Oil Production ◽  
Horizontal Wells ◽  
Accurate Method ◽  
Oil Wells ◽  
Shale Oil ◽  
Square Root ◽  
Production Rates ◽  
Time Flow ◽  
Bakken Shale

A recent study by the Wall Street Journal reveals that the hydrofractured horizontal wells in shales have been producing less than the industrial forecasts with the empirical hyperbolic decline curve analysis (DCA). As an alternative to DCA, we introduce a simple, fast and accurate method of estimating ultimate recovery in oil shales. We adopt a physics-based scaling approach to analyze oil rates and ultimate recovery from 14,888 active horizontal oil wells in the Bakken shale. To predict the Estimated Ultimate Recovery (EUR), we collapse production records from individual horizontal shale oil wells onto two segments of a master curve: (1) We find that cumulative oil production from 4845 wells is still growing linearly with the square root of time; and (2) 6401 wells are already in exponential decline after approximately seven years on production. In addition, 2363 wells have discontinuous production records, because of refracturing or changes in downhole flowing pressure, and are matched with a linear combination of scaling curves superposed in time. The remaining 1279 new wells with less than 12 months on production have too few production records to allow for robust matches. These wells are scaled with the slopes of other comparable wells in the square-root-of-time flow regime. In the end, we predict that total ultimate recovery from all existing horizontal wells in Bakken will be some 4.5 billion barrels of oil. We also find that wells completed in the Middle Bakken formation, in general, produce more oil than those completed in the Upper Three Forks formation. The newly completed longer wells with larger hydrofractures have higher initial production rates, but they decline faster and have EURs similar to the cheaper old wells. There is little correlation among EUR, lateral length, and the number and size of hydrofractures. Therefore, technology may not help much in boosting production of new wells completed in the poor immature areas along the edges of the Williston Basin. Operators and policymakers may use our findings to optimize the possible futures of the Bakken shale and other plays. More importantly, the petroleum industry may adopt our physics-based method as an alternative to the overly optimistic hyperbolic DCA that yields an ‘illusory picture’ of shale oil resources.

Measurement of Prompt Neutron Decay Constant of CFBR-II at Near Delayed Criticality Using Randomly Pulsed Neutron Method

2013 ◽  
Author(s):  
Lingli Song ◽  
Jiansheng Li ◽  
Haojun Zhou ◽  
Yu Jin
Keyword(s):  
Liquid Scintillation ◽  
Decay Constant ◽  
Detection System ◽  
Prompt Neutron ◽  
Neutron Decay ◽  
Timing Uncertainty ◽  
Neutron Method ◽  
Pulsed Neutron ◽  
Liquid Scintillation Detector ◽  
Good Agreement

Prompt neutron decay constant of CFBR-II (China’s Fast Burst Reactor) was measured by the randomly pulsed neutron method when the reactor was at the reactivity of −0.1$. A liquid scintillation detector was used to detect the leakage neutrons and the timing uncertainty of the detection system was less than 3ns. The detector and the Cf-252 fast ionization chamber were placed at several positions. Totally 5 prompt neutron timing distribution curves were obtained and the prompt neutron decay constant was 0.610us−1 in average with the uncertainty of 0.030us−1, which was in good agreement with the M.C. calculation.

scholarly journals Iraq Crude Oil Exports, Crude oil production rates and crude discharge, Gas Production Activities, Types of Oils and Asphalt for January, February, March /2016

2021 ◽  
Vol 7 (3) ◽  
pp. 1-9
Author(s):  
Ministry of Oil / Oil Marketing Company SOMO
Keyword(s):  
Crude Oil ◽  
Oil Production ◽  
Gas Production ◽  
Production Rates ◽  
Crude Oil Production ◽  
Oil Exports ◽  
Discharge Gas

Table 1. Iraq Crude Oil Exports – January 2016 Table 2. Iraq Crude Oil Exports – February 2016Table 3. Iraq Crude Oil Exports – March 2016Table 4. Crude oil production rates and crude discharge for January/ 2016Table 5. Oil Production Rates for January/2016Table 6. Gas Production Activities, Types of Oils and Asphalt for January /2016Table 7 crude oil production rates and crude discharge for February / 2016Table 8 Oil Production Rates for February /2016 Table 9 Gas Production Activities, Types of Oils and Asphalt for February / 2016Table 10. Crude oil production rates and crude discharge for March / 2016Table 11. Oil Production Rates for March /2016Table 12.Gas Production Activities, Types of Oils and Asphalt for March / 2016

Analysis of Pulsed-Neutron Decay-Time Logs in Acidized Carbonate Formations

1975 ◽  
Vol 15 (06) ◽  
pp. 453-466 ◽  
Author(s):  
A.S. Al-Saif ◽  
J.E. Cochrane ◽  
H.N. Edmondson ◽  
W.E. Youngblood
Keyword(s):  
Saudi Arabia ◽  
Decay Time ◽  
Water Saturation ◽  
Carbonate Reservoirs ◽  
Neutron Decay ◽  
Monitoring Technique ◽  
Acid Effect ◽  
Before And After ◽  
Open Hole ◽  
Pulsed Neutron

AL-SAIF, A.S., ARAMCO ABQAIQ, SAUDI ARABIA COCHRANE, J.E., MEMBER SPE-AIME, ARAMCO, DHAHRAN, SAUDI ARABIA EDMONDSON, H.N., SCHLUMBERGER TECHNICAL SERVICES, PARIS, FRANCE YOUNGBLOOD, W.E., MEMBER SPE-AIME, SCHLUMBERGER OVERSEAS, DHAHRAN, SAUDI ARABIA Abstract The measurement of thermal neutron decay times by means of pulsed neutron tools has become an important reservoir-monitoring technique. In many types of reservoirs, these measurements permit the location of oil remaining behind casing. A requisite condition for the application of this method is knowledge of formation porosity and chloride content. This knowledge usually is derivable from the open-hole logs run before completion of the well. However, when the producing zones are treated with hydrochloric acid, either of these parameters may be changed. This paper presents examples of dual-spacing thermal neutron decay-time logs in Arabia, where prior acidizing bas altered the log response to The prior acidizing bas altered the log response to The point of producing erroneous conclusions unless point of producing erroneous conclusions unless this effect is accounted for. A hypothesis is advanced explaining this phenomenon as the result of either or both the porosity increase created by acidization and the retention of chlorides from the acid by the formation. Although no way has been found to differentiate positively between the two effects, experience indicates that the cumulative effect observed on The decay-time log is permanent during the water-free productive tile of the well. Thus, the recognized production-monitoring technique, known as time-lapse decay-time logging, is still valid and useful providing that The original "reference" decay-time log is run after acidization. This paper investigates various aspects of the problem and details ways in which it has been problem and details ways in which it has been dealt with in practice. Introduction A dramatic acid effect on pulsed neutron decaytime measurements was recognized by the Arabian American Oil Co. (ARAMCO) late in 1973. Before this time, ARAMCO was successful in using periodic decay-time logs to monitor water-saturation changes in nonacidized carbonate reservoirs. During 1973, a number of logs were run in acidized wells in the Arab D reservoir of the Ghawar field for the purpose of detecting sources of water production. Results were confusing at best until a base log recorded in a clean oil producer revealed be acid effect producer revealed be acid effect Extensive inquires were made to shareholder companies, other Arabian Gulf operators, and to Schlumberger. It was found that, although acid effects had been recognized, no correction techniques had been devised. The only guideline given was to disregard water-saturation calculations in acidized formations. Since such calculations were the primary reason for running decay-time logs for monitoring, and most ARAMCO wells were acidized during completion, this guideline apparently left no alternative but to cease decay-time logging in carbonate reservoirs. Since there were no other techniques for water-saturation determination in cased holes, however, A was recognized that a workable solution to this problem had to be found. Early in 1974 a controlled evaluation program was begun to study the acid effect on dual-spacing decay-time measurements. The program considered the following questions. Is be acid effect truly caused by acidization of carbonate reservoirs? Is it a permanent effect, or does it disappear with oil or water production? What is the physical nature of the effect and can it be accounted for in water-saturation calculations? Can the anomalous behavior be used to evaluate the effectiveness of acid treatments? Dual-spacing decay-time logs were obtained in many wells, before and after acid treatments that displayed a variety of characteristics (such as, rates, volumes, concentrations, use of diverting agents, etc.). Also, open-hole porosity and resistivity measurements were obtained before and after treatment to study the effects of acid on other parameters. SPEJ P. 453

scholarly journals Relationship between Sowing Time, Variety, and Quality in Safflower

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Mehmet Oz
Keyword(s):  
Oleic Acid ◽  
Linoleic Acid ◽  
Production Rate ◽  
Linolenic Acid ◽  
Acid Production ◽  
Protein Production ◽  
Block Design ◽  
Oil Production ◽  
Production Rates ◽  
Sowing Time

This research was carried out to determine the rates of protein and oil production and fatty acid composition and their correlation coefficients in four safflower cultivars (Remzibey, Dincer, Balci, and Yenice) sown in the autumn and spring from 2013 to 2015. The experiment was carried out using split plots in a randomized block design and was replicated 3 times. The study found protein production rates between 15.20 and 18.08%, oil production rates between 24.58 and 31.99%, palmitic acid production rates between 5.93 and 7.01%, stearic acid production rates between 2.13 and 2.53%, oleic acid production rates between 12.08 and 31.58%, linoleic acid production rates between 78.61 and 59.08%, and linolenic acid production rates between 0.11 and 0.15%. Higher seed oil content values were obtained from spring sowing compared to autumn sowing (27.42% and 26.10%), and, in terms of both the evaluated sowing times and cultivars, the highest oil production rates were found in the Balci cultivar (32.20% and 31.78%) for both sowing times. It was determined that there is a positive and significant (r=0.476⁎⁎) relationship between oil with protein production rates but a negative and significant relationship between oil and linolenic acid production rates (r=-0.728⁎⁎). The oleic acid production rate was strongly negatively and significantly correlated with the linoleic acid production rate (r=-0.997⁎⁎).

Sign in / Sign up

Export Citation Format

Share Document