Carbon/Oxygen Or Resistivity/Pulsed Neutron Logging - A Case Study

1981 ◽  
Author(s):  
Michael E. Kerr
Keyword(s):  
Pulsed Neutron

A Pulsed Neutron Comparison Between an Open and Casedhole Well: An Alaskan Case Study

2018 ◽  
Author(s):  
J. Burt ◽  
T. Zhou ◽  
D. A. Rose ◽  
R. Grover ◽  
S. Ahmad ◽  
...  
Keyword(s):  
Pulsed Neutron

Logging Optimization and Data Analysis Enabling Bypass Pay Identification and Hydrocarbon Quantification with Advanced Pulsed Neutron Behind Casing

2021 ◽  
Author(s):  
Sviatoslav Iuras ◽  
Samira Ahmad ◽  
Chiara Cavalleri ◽  
Yernur Akashev
Keyword(s):  
Cross Section ◽  
Pore Space ◽  
High Energy ◽  
Elastic Cross Section ◽  
Gas Production ◽  
Donets Basin ◽  
Lithology Identification ◽  
Open Hole ◽  
Pulsed Neutron

Abstract Ukraine ranks the third largest gas reserves in Europe. Gas production is carried out mainly from the Dnieper-Donets Basin (DDB). A gradual decline in reserves is forcing Ukraine to actively search for possible sources to increase reserves by finding bypassed gas intervals in existing wells or exploration of new prospects. This paper describes 3 case studies, where advanced pulsed neutron logging technology has shown exceptional value in gas-bearing layer identification in different scenarios. The logging technology was applied for formation evaluation. The technology is based on the neutron interaction with the minerals and the fluids contained in the pore space. The logging tool combines measurements from multiple detectors and spacing for self-compensated neutron cross-capture section (sigma) and hydrogen index (HI), and the Fast Neutron Cross Section (FNXS) high-energy neutron elastic cross section rock property. Comprehensive capture and inelastic elemental spectroscopy are simultaneously recorded and processed to describe the elemental composition and the matrix properties, reducing the uncertainties related to drilling cuttings analysis, and overall, the petrophysical evaluation combined with other log outputs. The proposed methodology was tested in several wells, both in open hole and behind casing. In the study we present its application in three wells from different fields of the DDB. The log data acquisition and analysis were performed across several sandstone beds and carbonates formation with low porosities (<10%), in various combinations of casing and holes sizes. The results showed the robustness and effectiveness of using the advanced pulsed neutron logging (PNL) technologies in multiple cases: Case Study A: Enabling a standalone cased hole evaluation and highlighting new potential reservoir zones otherwise overlooked due to absence of open hole logs. Case Study B: Finding by-passed hydrocarbon intervals that were missed from log analysis based on conventional open hole logs for current field operator. Case Study C: Identifying gas saturated reservoirs and providing solid lithology identification that previously was questioned from drilling cuttings in an unconventional reservoir.

Sand Fill Detection Outside Tubing in Multi-Zone Completions Using Pulsed Neutron: A Case Study From a Development Field in Malaysia

2015 ◽  
Author(s):  
M Farid B M Amin ◽  
Nur Hazrina Bt Kamarul Zaman ◽  
M Saiful B Mohsin ◽  
Mohd Radzi B Omar ◽  
Fui Kent Wong ◽  
...  
Keyword(s):  
Pulsed Neutron

scholarly journals Development and Experimental Validation of a Correlation Monitor Tool Based on the Endogenous Pulsed Neutron Source Technique

2017 ◽  
Vol 24 (3) ◽  
pp. 441-461 ◽  
Author(s):  
Mohammad Arkani ◽  
Hossein Khalafi ◽  
Naser Vosoughi ◽  
Samad Khakshournia
Keyword(s):  
Neutron Source ◽  
Power Reactor ◽  
Cost Effective ◽  
System Structure ◽  
Effective Instrument ◽  
Measuring Tool ◽  
Pulsed Neutron ◽  
Pulsed Neutron Source ◽  
Good Agreement

AbstractA correlation measuring tool for an endogenous pulsed neutron source experiment is developed in this work. Paroxysmal pulses generated by a bursts of neutron chains are detected by a 10-kbit embedded shift register with a time resolution of 100 ns. The system is implemented on a single reprogrammable device making it a compact, cost-effective instrument, easily adaptable for any case study. The system was verified experimentally in theEsfahan heavy-water zero power reactor(EHWZPR). The results obtained by the measuring tool are validated by the Feynman-α experiment, and a good agreement is seen within the boundaries of statistical uncertainties. The theory of the methods is briefly initiated in the text. Also, the system structure is described, the experimental results and their uncertainties are discussed, and neutron statistics in EHWZPR is examined experimentally.

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