2 4 2018-NAPS-10 Discussion And Application Of Aftereffect ...€¦ · 2/8/2018 · Aftereffect Perf. **2x -5.7 Exp.2 *-1x Well use the aftereffect perforation. The oil bed in this

DISCUSSIONANDAPPLICATIONOFAFTEREFFECTPERFORATIONTECHNOLOGY

2018-NAPS-10AUTHORS:GuanghuaMu,SunZhizhong,(ChinaNationPetroleumCorporation )

TianLei,(Xi'anAoxing EnergyTechnologyCo.LTD)

CONTENTS

2018-NAPS-10/DISCUSSIONANDAPPLICATIONOFAFTEREFFECTPERFORATIONTECHNOLOGY

1

2

3

4

Introduction

PrincipleandFeatures

TestingResults

Application

NAPS-XX-18/UNHOLSTERWELLPOTENTIALUSINGCONVERGINGSHOCKWAVES

INTRODUCTION

Application of Jet Perforation Technology in Oil Fields（1950s - now）

Pros and Cons：

Pros：Small, efficient and economical

Cons：Forming a compacted zone near the perforation tunnel edge, thus reducing the

permeability and blocking oil & gas flow.



PRINCIPLE AND FEATURES

How to release the energy to the perforation tunnel to do work directly

thus transforming tunnel shape for better permeability?

1. The aftereffect loader made of the energy-contained material by specific formula and specially

designed charge loading structure is installed at the front end of the perforation charge.

2. When the perforation charge detonating and perforating, the high energy material in the

aftereffect loader will be pulled into the perforation tunnel by the high velocity jet.

3. The high energy material does work in the perforation tunnel, from scorching ignition to

deflagrate, producing pressure.



Numerical Simulation

The key of this technology is the procedure of doing work section-by-section through a

single ignition. The particles deflagrate in the limited space and produce pressure,

acting on the compacted zone formed by the jet, transforming the shape and physical

characteristics of the perforation tunnel and improving its flow ability.

Start of blasting Jet is produced Pull-in effect



Aftereffect loader Detonating cord Specially-made charge carrier Perforating charge

Aftereffect Perforator


theUDPAftereffectPerforatorFieldInstallation


TESTING RESULTS

Energetic Material

Explosive free, high temperature, impact resistant

◆ Using polymerized multi-function

structural material, free from explosive

source or radioactive material.

◆ Stable in high temperature, safe for

transport, storage and field job.

Temp. Degree T1 （H） T2 （SH）

Rating 160℃/200h 200℃/200h

Temp. Level High Temp.Ultra High

Temp.


DoingworkSaferThe aftereffect loader is coaxially installed at the front end of the perforating charge. After

perforation charge ignition, the aftereffect loader is pulled into the perforation tunnel and

instantly excited, and its energy loading on the main jet acts rapidly on the formation space to

maintaining or reducing the annulus pressure of the perforator, thus effectively preventing the

perforator barrel explosion or sticking in the well.

TESTING RESULTS


Aftereffect Perforation Jet Perforation

Sandstone Flow Efficiency Test Single Shot on Steel Target

Flow efficiency improved by 38%。 Tunnel volume increased by 44.94%

Conventional Perforation Tunnel

PerforationDirection

Aftereffect Perforation Tunnel

TESTING RESULTS


APPLICATION

Aftereffect Perforation Tunnel Form

Regular Perforation

Tunnel Form

Specifications of mature aftereffect perforator


APPLICATION

P-T Curve Test

Jet Perf. P-T Curve

Aftereffect Perf. P-T Curve


APPLICATION

Aftereffect Perf. P-T Curve （DP46RDX38-1）

Aftereffect Perf. P-T Curve （692SDP-127H-5）

P-T curve shows:1. Single wave peak;2. Time diff. >30ms, no

explosion overlap;3. Amplitude > 50MPa;4. Pressure release fast


APPLICATION

Exp.1

Perf.

TechnologyWell No.

MechanicalSkin S

Jet Perf.

**3x 0.09**11 10.5**6x 6.77

AftereffectPerf. **2x -5.7

Exp.2 *-1x Well use the aftereffect perforation.

The oil bed in this well is a compacted sandstone with the thickness of5.1m, the average porosity of 13% and the permeability of about 10md.Before the perforation job, the predicted oil output is 20m3/d; after theaftereffect perforation job, the output reaches 150m3/d.


APPLICATION

Exp.3 – additional perf. in low porosity, low permeability oil field

WellBeforeaftereffectperf. Afteraftereffectperf. Fluidincrease

DailyFluidproduction m3 Water Ratio%

DailyFluidproduction m3 WaterRatio %

A**-** 0.25 100 1.65 28.1 6.6 times

B**-** 1.45 30 3.3 100.0 2.27 times

C**-** 1 90 5.16 3.1 5.16 times

Exp.4 – water injection well

Well info.

Well name **-1 **-3 **-10 **-6 **-12 **-4

Perf. Thickness

m6 6 5 6 4 5

Before job

Injection speedm3/d

0 0 0 0 0 0

Injection pressure

Mpa＞18 ＞18 ＞18 ＞18 ＞18 ＞18

After job

Injection speedm3/d

18 12 13 9 3 11

Injection pressure

Mpa11 11 11 12 14 12


APPLICATION

The aftereffect perforation is a new technology based on optimization ofjet perforation with the unique principle and functional characteristics andcomparatively complex mechanism . Having achieved notable applicationeffects, this technology has been focused gradually by the oil and gasupstream industry. The development and application of this technologyhas upgraded jet perforation to a new level.


QUESTIONS?THANKYOU

2018-NAPS-10AUTHORS:GuanghuaMu,SunZhizhong,(ChinaNationPetroleumCorporation )

TianLei,(Xi'anAoxing EnergyTechnologyCo.LTD)

Documents

2 4 2018-NAPS-10 Discussion And Application Of Aftereffect ...€¦ · 2/8/2018 · Aftereffect Perf. **2x -5.7 Exp.2 *-1x Well use the aftereffect perforation. The oil bed in this