Field Trials of a New Method for the Measurement of Formation Gas Using
Pulsed-Neutron Instruments

Trcka, Darryl; Gilchrist, W.A.; Riley, Steve; Bruner, Mike; Esfandiari, Tom; Ly, Toan; Shearin, Dean; Patino, Teo; Murray, Hugh; Potter, James; Rose, Robert J.; Chen, Jason; Olsen, Shawn; Lovera, Omar; McCants, Dan; Berger, Alvin; Ellsworth, Kimberly Ann; Barolak, Greg; Martain, Randy; McFall, A.L.; Guo, Pingjun

doi:10.2523/102350-ms

Cited by 16 publications

(4 citation statements)

References 5 publications

(6 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The normalized RIN13 response of the measured dataset will fall between the modelled blue (100% water saturated formation) and the modelled red lines (100% gas saturated formation) that make up the DGE TM . The relative position Figure 3-Sensitivity of the inelastic ratios to gas as modelled by MCNP (6) of the logged response within the DGE TM is then used to determine quantitative gas saturation of the formation.…”

Section: Mdpnl Technologymentioning

confidence: 99%

“…The acquired data is analysed using Monte Carlo N-Particle (MCNP) to model expected responses for the different fluids (oil-, gas-and water-filled rock) as described by Trcka et al (6) . The MCNP modelling predicts the number and type of interactions and resulting gamma ray emissions a fast neutron undergoes prior to being captured.…”

Section: Mdpnl Technologymentioning

confidence: 99%

“…A multi-detector pulse neutron gamma ray counts ratio procedure was developed to quantitative gas saturation of the formation, as described by Trcka et al (6) . Due to the near identical size and mass of the hydrogen atom to a neutron, hydrogen is a primary element that controls the propagation of fast neutrons.…”

Section: Mdpnl Technologymentioning

confidence: 99%

See 2 more Smart Citations

Optimizing Memory Multidetector Pulsed Neutron Logging in Slim Horizontal Coil Tubing Drilled Wells Using a Carrier Assembly

Cedillo¹,

Raeesi²,

Zett³

et al. 2015

Day 2 Wed, March 25, 2015

View full text Add to dashboard Cite

Coiled tubing drilling (CTD) technology has been widely adopted as a cost-effective re-entry strategy to sidetrack from the existing wellbores, and drill high angle/horizontal wells to maximize recovery from remaining oil columns in the Alaska Prudhoe Bay field. The oil rim in this giant field is overlain by a gas cap and has been producing for over 36 years by various recovery mechanisms such as gravity drainage, water flood and miscible injection and hence, holds a complex fluid distribution with locally variable oil-water and gas-oil contacts.Determining current reservoir fluid contacts using multidetector pulse neutron logging (MDPNL) technology is a crucial component in the overall strategy to maximize production from each well and identify future drilling targets. This technology has been widely used in the industry for reservoir evaluation and surveillance in open-and cased-hole environments using conventional wireline techniques in standard borehole sizes. However, logging tool conveyance in CTD wells has been challenged due to small hole size and high angle/horizontal/U-shape wells.An innovative deployment assembly was developed by BP Alaska and Baker Hughes to acquire pulsed neutron data while tripping out of the hole during the wellbore cleanout operation, eliminating the need for a dedicated logging run, which in turn, reduces rig time costs. This deployment assembly consists of a non-magnetic stainless steel carrier and a memory adaptor that is attached to the MDPNL tool. The carrier does not limit tripping operations or wellbore circulation, and requires no wireline for data acquisition.Another major advantage of this assembly is the additional compressional strength provided to the tool, which reduces failure rates and provides a cost-effective well logging solution in highly deviated wells.This paper presents case studies in which this coiled tubing logging technology was applied in the Alaska Prudhoe Bay field. Various aspects of the technology are discussed, including the memoryenabled, three-detector pulsed neutron tool and carrier assembly configuration. The paper also discusses identification of reservoir fluid contacts and other petrophysical properties using the nuclear attributes extracted from MDPNL data, which ultimately provides the critical information needed for optimal perforation strategy and maximize oil production in CTD wells.

show abstract

Section: Mdpnl Technologymentioning

confidence: 99%

Section: Mdpnl Technologymentioning

confidence: 99%

See 1 more Smart Citation

Optimizing Memory Multidetector Pulsed Neutron Logging in Slim Horizontal Coil Tubing Drilled Wells Using a Carrier Assembly

Cedillo¹,

Raeesi²,

Zett³

et al. 2015

Day 2 Wed, March 25, 2015

View full text Add to dashboard Cite

show abstract

“…In the analysis of coal by well logs, parameters mainly include spontaneous potential (SP), GR, borehole diameter (CAL), DEN, AC, RLLD, and shallow investigate double lateral resistivity log (RLLS). However, due to the relatively loose structure of coal seam, CAL is prone to expansion in coal seam (Safar et al., 2009; Vieira et al., 2007) and can be affected by the coalbed methane content with changes of inverse (Hamada and Hegaxy, 2007; Trcka et al., 2006). The coal types has a close relationship with the SP log (Hou, 2000), and the detection depth of RLLD is higher than that of RLLS.…”

Section: Introductionmentioning

confidence: 99%

Quantitative measurement on coal components through the interpretation model of geophysical log: A case study from the Qaidam Basin, NW China

Liu

Tang

et al. 2021

Energy Exploration & Exploitation

View full text Add to dashboard Cite

The Iqe coalfield is one of the most significant coal production bases in the Qaidam Basin. Over the last few decades, core explorations have targeted the Dameigou Formation for No. 7 coal seam (M7). Although many M7 coal samples have been analyzed for coal components in the laboratory, the systematic understanding of the components and changes of coal in the whole Iqe coalfield is still inadequate. In this study, we focus on building log interpretation models to accurately calculate the content of coal components of M7, including ash yield (Aad), volatile matter (Vdaf), fixed carbon (FCad), and moisture (Mad). Multiple regression analysis and statistical method, combined with the rock volume model, were used to establish log interpretation models of coal components. A total of 28 coal samples from ZK1, ZK2, ZK11-5, ZK23-4, and ZK36-9 wells in the Iqe coalfield were involved in the modeling, as well as well-logs parameters, such as radioactivity (GR), compensation density (DEN), acoustic (AC), and resistivity (RLLD). According to sensitivity analysis, the fitted Aad and Vdaf contents of M7 increase with the increasing of DEN and GR values, whereas the FCad content shows the opposite way. Furthermore, the positive relationship between Aad and Vdaf ( R2 = 0.59) and the negative relationship between Aad and FCad ( R2 = 0.92) as well as Vdaf and FCad ( R2 = 0.69) indicate that Aad is a key factor in coal and should be prior determined. Finally, based on the multiple regression analysis and rock volume model, we proposed log interpretation models for M7 coal components in the Iqe coalfield, these models have been examined successfully by the case studies from the same coalfield and will provide new insights into the application of geophysical log parameters for coal quality evaluation.

show abstract

A method for tight gas reservoir evaluation based on nuclear logging

Fu,

Wu,

Sun

et al. 2024

Acta Geophys.

View full text Add to dashboard Cite

Field Trials of a New Method for the Measurement of Formation Gas Using Pulsed-Neutron Instruments

Cited by 16 publications

References 5 publications

Optimizing Memory Multidetector Pulsed Neutron Logging in Slim Horizontal Coil Tubing Drilled Wells Using a Carrier Assembly

Optimizing Memory Multidetector Pulsed Neutron Logging in Slim Horizontal Coil Tubing Drilled Wells Using a Carrier Assembly

Quantitative measurement on coal components through the interpretation model of geophysical log: A case study from the Qaidam Basin, NW China

A method for tight gas reservoir evaluation based on nuclear logging

Contact Info

Product

Resources

About