Best Practices for Multizone Stimulation Using Composite Plugs

Lehr, Douglas J.; Cramer, David D.

doi:10.2118/142744-ms

Cited by 12 publications

(1 citation statement)

References 11 publications

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“…Downhole shut-in tools are instrumental in performing multiple DFITs simultaneously in subpressured reservoirs. Lehr and Cramer (2011) provide best practices for using composite bridge plugs in multizone completions, which have been extended to this application. Additionally, selecting RPBs that can be set and retrieved with wireline can help reduce cost and operational time.…”

Section: Best Practicesmentioning

confidence: 99%

A Method To Perform Multiple Diagnostic Fracture Injection Tests Simultaneously in a Single Wellbore

Martin

Cramer

Roberts

et al. 2013

SPE Production &Amp; Operations

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This paper presents a unique process for deriving reservoir properties (i.e., minimum horizontal stress, kh/u, and reservoir pressure) in isolated reservoir layers intersected by the same vertical wellbore. It is based on simultaneously performing multiple diagnostic fracture-injection tests (DFIT) with extended multiday shut-in periods using downhole shut-in tools and bottomhole memory gauges.A case study of 58 vertical wells completed in the Mesaverde and Dakota sandstones of the San Juan basin is used to describe and assess the above application. These intervals are gas productive, slightly to significantly subpressured, and possess a very low permeability pore network enhanced by natural fracture networks. As many as seven individual intervals per well were tested using the simultaneous process in an area spanning the entire San Juan basin. Large-scale, multistage hydraulic fracturing is necessary to establish commercial production from these intervals. The diagnostic tests were done before the large-scale fracture treatments, yet did not impede the subsequent implementation of the treatments. In the Dakota interval, the diagnostic testing results agreed well with the kh derived from post-fracture production analysis and led to a process of treatment design optimization. In the Mesaverde interval, less agreement was found between diagnostic-test and production-analysis results. Despite the lack of validation, fluid leakoff rates measured during the diagnostic testing provided insight into fracture half-length differences documented in a previous study of microseismic mapping. As part of the case study, procedural guidelines and best practices developed in the process of performing over 200 tests will be discussed.

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Section: Best Practicesmentioning

confidence: 99%

A Method To Perform Multiple Diagnostic Fracture Injection Tests Simultaneously in a Single Wellbore

Martin

Cramer

Roberts

et al. 2013

SPE Production &Amp; Operations

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Coiled Tubing Milling Operations: Successful Application of an Innovative Variable-Water Hammer Extended-Reach BHA to Improve End Load Efficiencies of a PDM in Horizontal Wells

Castaneda¹,

Schneider

Brunskill³

2011

All Days

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Horizontal completions continue to increase in popularity throughout the industry. In North America the majority of horizontal wells are drilled in shale gas formations. These formations require fracture stimulation for economic production. The majority of these stimulations are completed by fracturing four to six clusters of perforations simultaneously at high rates followed by a mechanical isolation with a composite bridge plug. As the horizontal wells increase in length the number of plugs required increases, with up to twenty plugs not being uncommon. These plugs are removed with a positive displacement motor (PDM) and mill run on either coiled tubing (CT) or jointed pipe. In longer-reach horizontal completions, plug removal using CT becomes more challenging as the efficiency of surface end loads transmitted to the mill are reduced. Quite often the deepest plugs can not be reached with standard coiled tubing, instead requiring larger-diameter, more costly, coiled tubing or jointed pipe. The need to extend the operating depth to effectively operate PDMs and reach the deepest plugs has led to development of several tool systems. This paper will discuss the engineering, design, testing and initial field trial results of a variable fluid hammer extended-reach tool; how it was used to improve plug milling performance, to give superior control of weight on bit, to extend coiled tubing reach in the horizontal section and to reduce operational time. These field results will be compared with results using other methods of friction reduction, such as pipe-on-pipe friction reducers.

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A Unique Plug for a Restricted Wellbore

Blevins

Frazier²

2011

All Days

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The completion of most cased-hole horizontal shale wells requires multi-stage stimulations, which calls for some form of plug isolation between the stages. The plugs are normally composite flow-thru plugs that are pumped downhole on electric wire to the required measured depth.This case history describes a project where the industry's standard-sized composite plugs with a 3.85-3.92 in. outer diameter (OD) would not pass through the curved section of the horizontal wellbore with an internal diameter (ID) of 4.276 in. Small doglegs in the curved section of the wellbore presented geometrical and completion challenges. Three attempts to push the plugs through this section of the wellbore failed, resulting in the plugs getting stuck. The project faced a challenge: Could a plug be built in a timely manner that would pass through the curve restrictions, set in the production casing, withstand stimulation pressure, and still be drillable?The project challenge was successfully answered. A new composite plug was designed that met all of the wellbore requirements and allowed a successful completion of the wellbore. The 3.25 in. OD flow-thru composite plug was set in a 4.276 in. inner diameter (ID) production casing. Altogether, six plugs were pumped down and set in the wellbore of the West Texas, University Land 39 #29-1H well. The plug met all of the required performance expectations during all stages of the completion.This plug's application goes beyond the standard horizontal wellbore with multi-stage stimulation requirements. The uniqueness of this plug is its ability to be modified for a variety of applications where reduced internal diameters in production casing create completion challenges below the restriction.The details of the wellbore deviations and the final plug design solution are included in this paper.

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Best Practices for Multizone Stimulation Using Composite Plugs

Cited by 12 publications

References 11 publications

A Method To Perform Multiple Diagnostic Fracture Injection Tests Simultaneously in a Single Wellbore

A Method To Perform Multiple Diagnostic Fracture Injection Tests Simultaneously in a Single Wellbore

Coiled Tubing Milling Operations: Successful Application of an Innovative Variable-Water Hammer Extended-Reach BHA to Improve End Load Efficiencies of a PDM in Horizontal Wells

A Unique Plug for a Restricted Wellbore

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